Remove unused deprecation message of the service worker redirected response restriction.

third_party/WebKit/Source/core/loader/DocumentLoader.cpp

Index: third_party/WebKit/Source/core/loader/DocumentLoader.cpp
diff --git a/third_party/WebKit/Source/core/loader/DocumentLoader.cpp b/third_party/WebKit/Source/core/loader/DocumentLoader.cpp
index 6bfe79f90773bee17c7d9503d1101ce47d07e072..63a756bd956e03b5e45cecf9bfca1515eec8ce8b 100644
--- a/third_party/WebKit/Source/core/loader/DocumentLoader.cpp
+++ b/third_party/WebKit/Source/core/loader/DocumentLoader.cpp
@@ -458,19 +458,6 @@ void DocumentLoader::FinishedLoading(double finish_time) {
   application_cache_host_->FinishedLoadingMainResource();
   EndWriting();
   ClearMainResourceHandle();
-
-  // Shows the deprecation message and measures the impact of the new security
-  // restriction which disallows responding to navigation requests with
-  // redirected responses in the service worker.
-  // TODO(horo): Remove this when we actually introduce the restriction in
-  // RespondWithObserver.
-  if (response_.WasFetchedViaServiceWorker() &&
-      response_.UrlListViaServiceWorker().size() > 1) {
-    Deprecation::CountDeprecation(
-        frame_,
-        UseCounter::
-            kServiceWorkerRespondToNavigationRequestWithRedirectedResponse);
-  }
 }
 
 bool DocumentLoader::RedirectReceived(