Get rid of unused functions kit(TextAffinity) and core(TextAffinity) in TextAffinity.h

Source/core/editing/TextAffinity.h

 /*
  * Copyright (C) 2004 Apple Computer, 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
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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 #ifndef TextAffinity_h
 #define TextAffinity_h
 
-#ifdef __OBJC__
-#include <AppKit/NSTextView.h>
-#endif
-
 namespace blink {
 
-// These match the AppKit values for these concepts.
-// From NSTextView.h:
-// NSSelectionAffinityUpstream = 0
-// NSSelectionAffinityDownstream = 1
-enum class TextAffinity { Upstream = 0, Downstream = 1 };
+enum class TextAffinity { Upstream, Downstream };
 
 } // namespace blink
 
-#ifdef __OBJC__
-
-inline NSSelectionAffinity kit(blink::TextAffinity affinity)
-{
-    return static_cast<NSSelectionAffinity>(affinity);
-}
-
-inline blink::TextAffinity core(NSSelectionAffinity affinity)
-{
-    return static_cast<blink::TextAffinity>(affinity);
-}
-
-#endif
-
 #endif // TextAffinity_h