Remove HTMLVideoElement.

sky/engine/core/frame/UseCounter.cpp

Index: sky/engine/core/frame/UseCounter.cpp
diff --git a/sky/engine/core/frame/UseCounter.cpp b/sky/engine/core/frame/UseCounter.cpp
index 080e0d923248e11e6b5595afe9b802e13de06c45..becc740c489d7181cf016985ca348326169ccb17 100644
--- a/sky/engine/core/frame/UseCounter.cpp
+++ b/sky/engine/core/frame/UseCounter.cpp
@@ -157,24 +157,6 @@ String UseCounter::deprecationMessage(Feature feature)
     case CSSStyleSheetInsertRuleOptionalArg:
         return "Calling CSSStyleSheet.insertRule() with one argument is deprecated. Please pass the index argument as well: insertRule(x, 0).";
 
-    case PrefixedVideoSupportsFullscreen:
-        return "'HTMLVideoElement.webkitSupportsFullscreen' is deprecated. Its value is true if the video is loaded.";
-
-    case PrefixedVideoDisplayingFullscreen:
-        return "'HTMLVideoElement.webkitDisplayingFullscreen' is deprecated. Please use the 'fullscreenchange' and 'webkitfullscreenchange' events instead.";
-
-    case PrefixedVideoEnterFullscreen:
-        return "'HTMLVideoElement.webkitEnterFullscreen()' is deprecated. Please use 'Element.requestFullscreen()' and 'Element.webkitRequestFullscreen()' instead.";
-
-    case PrefixedVideoExitFullscreen:
-        return "'HTMLVideoElement.webkitExitFullscreen()' is deprecated. Please use 'Document.exitFullscreen()' and 'Document.webkitExitFullscreen()' instead.";
-
-    case PrefixedVideoEnterFullScreen:
-        return "'HTMLVideoElement.webkitEnterFullScreen()' is deprecated. Please use 'Element.requestFullscreen()' and 'Element.webkitRequestFullscreen()' instead.";
-
-    case PrefixedVideoExitFullScreen:
-        return "'HTMLVideoElement.webkitExitFullScreen()' is deprecated. Please use 'Document.exitFullscreen()' and 'Document.webkitExitFullscreen()' instead.";
-
     case MediaErrorEncrypted:
         return "'MediaError.MEDIA_ERR_ENCRYPTED' is deprecated. This error code is never used.";