Remove in-process test networking servers

.ado/build-template.yml

@@ -279,16 +279,12 @@ extends:
                 value: false
               #10732 - WebSocketIntegrationTest::SendReceiveSsl fails on Windows Server 2022.
               #12714 - Disable for first deployment of test website.
+              #other  - WebSocketIntegrationTest::AdditionalHeaders throws '[0x801901f4] Internal server error (500).'
+              #       - WebSocketIntegrationTest are currently unsable on CI hosts. Work fine on local machines.
               - name: Desktop.IntegrationTests.Filter
                 value: >
                   (FullyQualifiedName!~Microsoft::React::Test::RNTesterHeadlessTests)&
-                  (FullyQualifiedName!=Microsoft::React::Test::WebSocketIntegrationTest::ConnectClose)&
-                  (FullyQualifiedName!=Microsoft::React::Test::WebSocketIntegrationTest::ConnectNoClose)&
-                  (FullyQualifiedName!=Microsoft::React::Test::WebSocketIntegrationTest::SendReceiveClose)&
-                  (FullyQualifiedName!=Microsoft::React::Test::WebSocketIntegrationTest::SendConsecutive)&
-                  (FullyQualifiedName!=Microsoft::React::Test::WebSocketIntegrationTest::SendReceiveLargeMessage)&
-                  (FullyQualifiedName!=Microsoft::React::Test::WebSocketIntegrationTest::SendReceiveSsl)&
-                  (FullyQualifiedName!=Microsoft::React::Test::HttpOriginPolicyIntegrationTest)
+                  (FullyQualifiedName!~Microsoft::React::Test::WebSocketIntegrationTest)
               #6799 - HostFunctionTest, HostObjectProtoTest crash under JSI/V8;
               #        PreparedJavaScriptSourceTest asserts/fails under JSI/ChakraCore
               - name: Desktop.UnitTests.Filter

change/react-native-windows-7d9a085f-d222-4893-964b-4b39501b550f.json

@@ -0,0 +1,7 @@
+{
+  "type": "prerelease",
+  "comment": "Drop in-process HTTP test server",
+  "packageName": "react-native-windows",
+  "email": "julio.rocha@microsoft.com",
+  "dependentChangeType": "patch"
+}