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

third_party/WebKit/Source/core/frame/Deprecation.cpp

Index: third_party/WebKit/Source/core/frame/Deprecation.cpp
diff --git a/third_party/WebKit/Source/core/frame/Deprecation.cpp b/third_party/WebKit/Source/core/frame/Deprecation.cpp
index 279c17385aed54dcefc70d3d5de0305071063760..5247e37c98027775843c00e45ece14dd839ff6f6 100644
--- a/third_party/WebKit/Source/core/frame/Deprecation.cpp
+++ b/third_party/WebKit/Source/core/frame/Deprecation.cpp
@@ -385,13 +385,6 @@ String Deprecation::DeprecationMessage(UseCounter::Feature feature) {
       return replacedBy("VREyeParameters.offset",
                         "view matrices provided by VRFrameData");
 
-    case UseCounter::
-        kServiceWorkerRespondToNavigationRequestWithRedirectedResponse:
-      return String::Format(
-          "The service worker responded to the navigation request with a "
-          "redirected response. This will result in an error in %s.",
-          milestoneString(M59));
-
     case UseCounter::kCSSSelectorInternalMediaControlsOverlayCastButton:
       return willBeRemoved(
           "-internal-media-controls-overlay-cast-button selector", M59,