Get rid of a redundant function Position::deprecatedEditingOffset()

Source/core/editing/Position.h

 /*
  * Copyright (C) 2004, 2006, 2008 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 119 matching lines @@
     // |anchorNode()| function:
     //   - OffsetInAnchor  m_offset
     //   - BeforeChildren  0
     //   - BeforeAnchor    0
     //   - AfterChildren   last editing offset in anchor node
     //   - AfterAnchor     last editing offset in anchor node
     // Editing operations will change in anchor node rather than nodes around
     // anchor node.
     int computeEditingOffset() const;
 
-    // New code should not use this function.
-    int deprecatedEditingOffset() const;
-
     // These are convenience methods which are smart about whether the position is neighbor anchored or parent anchored
     Node* computeNodeBeforePosition() const;
     Node* computeNodeAfterPosition() const;
 
     // Returns node as |Range::firstNode()|. This position must be a
     // |PositionAnchorType::OffsetInAhcor| to behave as |Range| boundary point.
     Node* nodeAsRangeFirstNode() const;
 
     // Similar to |nodeAsRangeLastNode()|, but returns a node in a range.
     Node* nodeAsRangeLastNode() const;
@@ skipping 302 matching lines @@
 
 } // namespace blink
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 void showTree(const blink::Position&);
 void showTree(const blink::Position*);
 #endif
 
 #endif // Position_h