Remove PLATFORM(BLACKBERRY) support.

Source/WTF/wtf/text/StringImpl.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2013 Apple Inc. All rights reserved.
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 25 matching lines @@
 #endif
 
 #if USE(CF)
 typedef const struct __CFString * CFStringRef;
 #endif
 
 #ifdef __OBJC__
 @class NSString;
 #endif
 
-#if PLATFORM(BLACKBERRY)
-#include <BlackBerryPlatformString.h>
-#endif
-
 // FIXME: This is a temporary layering violation while we move string code to WTF.
 // Landing the file moves in one patch, will follow on with patches to change the namespaces.
 namespace JSC {
 struct IdentifierASCIIStringTranslator;
 namespace LLInt { class Data; }
 class LLIntOffsetsExtractor;
 template <typename T> struct IdentifierCharBufferTranslator;
 struct IdentifierLCharFromUCharTranslator;
 }
 
@@ skipping 1278 matching lines @@
 }
 
 using WTF::StringImpl;
 using WTF::equal;
 using WTF::equalNonNull;
 using WTF::TextCaseSensitivity;
 using WTF::TextCaseSensitive;
 using WTF::TextCaseInsensitive;
 
 #endif