Remove Apple's unused implementation of private browsing from WebCore

Source/WebCore/page/PageConsole.cpp

 /*
  * Copyright (C) 2013 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 81 matching lines @@
         return;
 
     if (callStack)
         InspectorInstrumentation::addMessageToConsole(page, source, LogMessageType, level, message, callStack, requestIdentifier);
     else
         InspectorInstrumentation::addMessageToConsole(page, source, LogMessageType, level, message, url, lineNumber, state, requestIdentifier);
 
     if (source == CSSMessageSource)
         return;
 
-    if (page->settings()->privateBrowsingEnabled())
-        return;
-
     page->chrome()->client()->addMessageToConsole(source, level, message, lineNumber, url);
 }
 
 // static
 void PageConsole::mute()
 {
     muteCount++;
 }
 
 // static
 void PageConsole::unmute()
 {
     ASSERT(muteCount > 0);
     muteCount--;
 }
 
 } // namespace WebCore