Revert "Retry ConnectionCanSendAndReceiveDifferentMessageSizesWebSocketsTransport (#55923)" (#55953)

This reverts commit cf5ba0f.

The test was only failing in the CI for a PR we think was causing legitimate failures.

Author: amcasey

eng/test-configuration.json

@@ -11,7 +11,6 @@
     {"testName": {"contains": "POST_ServerAbort_ClientReceivesAbort"}},
     {"testName": {"contains": "CanLaunchPhotinoWebViewAndClickButton"}},
     {"testName": {"contains": "CheckInvalidHostingModelParameter"}},
-    {"testName": {"contains": "ConnectionCanSendAndReceiveDifferentMessageSizesWebSocketsTransport"}},
     {"testAssembly": {"contains": "IIS"}},
     {"testAssembly": {"contains": "Template"}},
     {"failureMessage": {"contains":"(Site is started but no worker process found)"}},