Remove dead code related to compositing from Sky

sky/engine/platform/Logging.cpp

Index: sky/engine/platform/Logging.cpp
diff --git a/sky/engine/platform/Logging.cpp b/sky/engine/platform/Logging.cpp
index eb7248f98ef42fe53daf4321d7c71ebe60d0db51..2e2b4ddb649d2dffcf8937372fd97f46795e5265 100644
--- a/sky/engine/platform/Logging.cpp
+++ b/sky/engine/platform/Logging.cpp
@@ -58,8 +58,6 @@ WTFLogChannel LogProgress =           { WTFLogChannelOff };
 
 WTFLogChannel LogFileAPI =            { WTFLogChannelOff };
 
-WTFLogChannel LogCompositing =        { WTFLogChannelOff };
-
 WTFLogChannel LogScriptedAnimationController = { WTFLogChannelOff };
 WTFLogChannel LogTimers =                      { WTFLogChannelOff };
 
@@ -119,9 +117,6 @@ WTFLogChannel* getChannelFromName(const String& channelName)
     if (equalIgnoringCase(channelName, String("FileAPI")))
         return &LogFileAPI;
 
-    if (equalIgnoringCase(channelName, String("Compositing")))
-        return &LogCompositing;
-
     if (equalIgnoringCase(channelName, String("ScriptedAnimationController")))
         return &LogScriptedAnimationController;