diff --git a/appengine/flexible_python37_and_earlier/websockets/README.md b/appengine/flexible_python37_and_earlier/websockets/README.md
deleted file mode 100644
index fabd0995a40..00000000000
--- a/appengine/flexible_python37_and_earlier/websockets/README.md
+++ /dev/null
@@ -1,11 +0,0 @@
-# Python websockets sample for Google App Engine Flexible Environment
-
-This sample demonstrates how to use websockets on [Google App Engine Flexible Environment](https://cloud.google.com/appengine).
-
-## Running locally
-
-Refer to the [top-level README](../README.md) for instructions on running and deploying.
-
-To run locally, you need to use gunicorn with the ``flask_socket`` worker:
-
-    $ gunicorn -b 127.0.0.1:8080 -k flask_sockets.worker main:app
diff --git a/appengine/flexible_python37_and_earlier/websockets/app.yaml b/appengine/flexible_python37_and_earlier/websockets/app.yaml
deleted file mode 100644
index 8a323ffe30f..00000000000
--- a/appengine/flexible_python37_and_earlier/websockets/app.yaml
+++ /dev/null
@@ -1,36 +0,0 @@
-# Copyright 2021 Google LLC
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-runtime: python
-env: flex
-
-# Use a special gunicorn worker class to support websockets.
-entrypoint: gunicorn -b :$PORT -k flask_sockets.worker main:app
-
-runtime_config:
-  python_version: 3
-
-# Use only a single instance, so that this local-memory-only chat app will work
-# consistently with multiple users. To work across multiple instances, an
-# extra-instance messaging system or data store would be needed.
-manual_scaling:
-  instances: 1
-
-
-# For applications which can take advantage of session affinity
-# (where the load balancer will attempt to route multiple connections from
-# the same user to the same App Engine instance), uncomment the folowing:
-
-# network:
-#   session_affinity: true
diff --git a/appengine/flexible_python37_and_earlier/websockets/main.py b/appengine/flexible_python37_and_earlier/websockets/main.py
deleted file mode 100644
index 132160d9ab5..00000000000
--- a/appengine/flexible_python37_and_earlier/websockets/main.py
+++ /dev/null
@@ -1,56 +0,0 @@
-# Copyright 2018 Google LLC
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-
-# [START gae_flex_websockets_app]
-from flask import Flask, render_template
-from flask_sockets import Sockets
-
-
-app = Flask(__name__)
-sockets = Sockets(app)
-
-
-@sockets.route("/chat")
-def chat_socket(ws):
-    while not ws.closed:
-        message = ws.receive()
-        if message is None:  # message is "None" if the client has closed.
-            continue
-        # Send the message to all clients connected to this webserver
-        # process. (To support multiple processes or instances, an
-        # extra-instance storage or messaging system would be required.)
-        clients = ws.handler.server.clients.values()
-        for client in clients:
-            client.ws.send(message)
-
-
-# [END gae_flex_websockets_app]
-
-
-@app.route("/")
-def index():
-    return render_template("index.html")
-
-
-if __name__ == "__main__":
-    print(
-        """
-This can not be run directly because the Flask development server does not
-support web sockets. Instead, use gunicorn:
-
-gunicorn -b 127.0.0.1:8080 -k flask_sockets.worker main:app
-
-"""
-    )
diff --git a/appengine/flexible_python37_and_earlier/websockets/main_test.py b/appengine/flexible_python37_and_earlier/websockets/main_test.py
deleted file mode 100644
index 597f2416d1c..00000000000
--- a/appengine/flexible_python37_and_earlier/websockets/main_test.py
+++ /dev/null
@@ -1,82 +0,0 @@
-# Copyright 2018 Google LLC
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-import socket
-import subprocess
-
-import pytest
-import requests
-from retrying import retry
-import websocket
-
-
-@pytest.fixture(scope="module")
-def server():
-    """Provides the address of a test HTTP/websocket server.
-    The test server is automatically created before
-    a test and destroyed at the end.
-    """
-    # Ask the OS to allocate a port.
-    sock = socket.socket()
-    sock.bind(("127.0.0.1", 0))
-    port = sock.getsockname()[1]
-
-    # Free the port and pass it to a subprocess.
-    sock.close()
-
-    bind_to = f"127.0.0.1:{port}"
-    server = subprocess.Popen(
-        ["gunicorn", "-b", bind_to, "-k" "flask_sockets.worker", "main:app"],
-        stdout=subprocess.PIPE,
-        stderr=subprocess.PIPE,
-    )
-
-    # With btlr, there can be many processes are spawned and the
-    # server might be in a tight memory situation, so let's wait for 2
-    # mins.
-    # Wait until the server responds before proceeding.
-    @retry(wait_fixed=50, stop_max_delay=120000)
-    def check_server(url):
-        requests.get(url)
-
-    check_server(f"http://{bind_to}/")
-
-    yield bind_to
-
-    server.kill()
-
-    # Dump the logs for debugging
-    out, err = server.communicate()
-    print(f"gunicorn stdout: {out}")
-    print(f"gunicorn stderr: {err}")
-
-
-def test_http(server):
-    result = requests.get(f"http://{server}/")
-    assert "Python Websockets Chat" in result.text
-
-
-def test_websocket(server):
-    url = f"ws://{server}/chat"
-    ws_one = websocket.WebSocket()
-    ws_one.connect(url)
-
-    ws_two = websocket.WebSocket()
-    ws_two.connect(url)
-
-    message = "Hello, World"
-    ws_one.send(message)
-
-    assert ws_one.recv() == message
-    assert ws_two.recv() == message
diff --git a/appengine/flexible_python37_and_earlier/websockets/noxfile_config.py b/appengine/flexible_python37_and_earlier/websockets/noxfile_config.py
deleted file mode 100644
index 1665dd736f8..00000000000
--- a/appengine/flexible_python37_and_earlier/websockets/noxfile_config.py
+++ /dev/null
@@ -1,39 +0,0 @@
-# Copyright 2023 Google LLC
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-# Default TEST_CONFIG_OVERRIDE for python repos.
-
-# You can copy this file into your directory, then it will be imported from
-# the noxfile.py.
-
-# The source of truth:
-# https://github.com/GoogleCloudPlatform/python-docs-samples/blob/main/noxfile_config.py
-
-TEST_CONFIG_OVERRIDE = {
-    # You can opt out from the test for specific Python versions.
-    # Skipping for Python 3.9 due to pyarrow compilation failure.
-    "ignored_versions": ["2.7", "3.8", "3.9", "3.10", "3.11", "3.12", "3.13"],
-    # Old samples are opted out of enforcing Python type hints
-    # All new samples should feature them
-    "enforce_type_hints": False,
-    # An envvar key for determining the project id to use. Change it
-    # to 'BUILD_SPECIFIC_GCLOUD_PROJECT' if you want to opt in using a
-    # build specific Cloud project. You can also use your own string
-    # to use your own Cloud project.
-    "gcloud_project_env": "GOOGLE_CLOUD_PROJECT",
-    # 'gcloud_project_env': 'BUILD_SPECIFIC_GCLOUD_PROJECT',
-    # A dictionary you want to inject into your test. Don't put any
-    # secrets here. These values will override predefined values.
-    "envs": {},
-}
diff --git a/appengine/flexible_python37_and_earlier/websockets/requirements-test.txt b/appengine/flexible_python37_and_earlier/websockets/requirements-test.txt
deleted file mode 100644
index 92b9194cf63..00000000000
--- a/appengine/flexible_python37_and_earlier/websockets/requirements-test.txt
+++ /dev/null
@@ -1,3 +0,0 @@
-pytest==8.2.0
-retrying==1.3.4
-websocket-client==1.7.0
diff --git a/appengine/flexible_python37_and_earlier/websockets/requirements.txt b/appengine/flexible_python37_and_earlier/websockets/requirements.txt
deleted file mode 100644
index c1525d36077..00000000000
--- a/appengine/flexible_python37_and_earlier/websockets/requirements.txt
+++ /dev/null
@@ -1,6 +0,0 @@
-Flask==1.1.4 # it seems like Flask-sockets doesn't play well with 2.0+
-Flask-Sockets==0.2.1
-gunicorn==23.0.0
-requests==2.31.0
-markupsafe==2.0.1
-Werkzeug==1.0.1;
diff --git a/appengine/flexible_python37_and_earlier/websockets/templates/index.html b/appengine/flexible_python37_and_earlier/websockets/templates/index.html
deleted file mode 100644
index af6d791f148..00000000000
--- a/appengine/flexible_python37_and_earlier/websockets/templates/index.html
+++ /dev/null
@@ -1,96 +0,0 @@
-{#
-# Copyright 2018 Google LLC
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#}
-<!doctype html>
-<html>
-  <head>
-    <title>Google App Engine Flexible Environment - Python Websockets Chat</title>
-    <meta name="viewport" content="width=device-width, initial-scale=1.0">
-  </head>
-  <body>
-
-    <!-- [START gae_flex_websockets_form] -->
-    <p>Chat demo</p>
-    <form id="chat-form">
-      <textarea id="chat-text" placeholder="Enter some text..."></textarea>
-      <button type="submit">Send</button>
-    </form>
-
-    <div>
-      <p>Messages:</p>
-      <ul id="chat-response"></ul>
-    </div>
-
-    <div>
-      <p>Status:</p>
-      <ul id="chat-status"></ul>
-    </div>
-    <!-- [END gae_flex_websockets_form] -->
-
-    <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.4/jquery.min.js"></script>
-    <script>
-    // [START gae_flex_websockets_js]
-    $(function() {
-      /* If the main page is served via https, the WebSocket must be served via
-         "wss" (WebSocket Secure) */
-      var scheme = window.location.protocol == "https:" ? 'wss://' : 'ws://';
-      var webSocketUri =  scheme
-                          + window.location.hostname
-                          + (location.port ? ':'+location.port: '')
-                          + '/chat';
-
-      /* Get elements from the page */
-      var form = $('#chat-form');
-      var textarea = $('#chat-text');
-      var output = $('#chat-response');
-      var status = $('#chat-status');
-
-      /* Helper to keep an activity log on the page. */
-      function log(text){
-        status.append($('<li>').text(text))
-      }
-
-      /* Establish the WebSocket connection and register event handlers. */
-      var websocket = new WebSocket(webSocketUri);
-
-      websocket.onopen = function() {
-        log('Connected');
-      };
-
-      websocket.onclose = function() {
-        log('Closed');
-      };
-
-      websocket.onmessage = function(e) {
-        log('Message received');
-        output.append($('<li>').text(e.data));
-      };
-
-      websocket.onerror = function(e) {
-        log('Error (see console)');
-        console.log(e);
-      };
-
-      /* Handle form submission and send a message to the websocket. */
-      form.submit(function(e) {
-        e.preventDefault();
-        var data = textarea.val();
-        websocket.send(data);
-      });
-    });
-    // [END gae_flex_websockets_js]
-    </script>
-  </body>
-</html>