remove SK_SUPPORT_LEGACY_PIXELREF_UNFLATTENABLE code

include/core/SkBitmap.h

 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkBitmap_DEFINED
 #define SkBitmap_DEFINED
 
@@ skipping 735 matching lines @@
 
     uint8_t     fFlags;
 
     void internalErase(const SkIRect&, U8CPU a, U8CPU r, U8CPU g, U8CPU b)const;
 
     /*  Unreference any pixelrefs or colortables
     */
     void freePixels();
     void updatePixelsFromRef() const;
 
-    void legacyUnflatten(SkReadBuffer&);
-
     static void WriteRawPixels(SkWriteBuffer*, const SkBitmap&);
     static bool ReadRawPixels(SkReadBuffer*, SkBitmap*);
 
     friend class SkBitmapSource;    // unflatten
     friend class SkReadBuffer;      // unflatten, rawpixels
     friend class SkWriteBuffer;     // rawpixels
     friend struct SkBitmapProcState;
 };
 
 class SkAutoLockPixels : SkNoncopyable {
@@ skipping 42 matching lines @@
 
 inline SkPMColor SkBitmap::getIndex8Color(int x, int y) const {
     SkASSERT(fPixels);
     SkASSERT(kIndex_8_SkColorType == this->colorType());
     SkASSERT((unsigned)x < (unsigned)this->width() && (unsigned)y < (unsigned)this->height());
     SkASSERT(fColorTable);
     return (*fColorTable)[*((const uint8_t*)fPixels + y * fRowBytes + x)];
 }
 
 #endif