remove dead methods now that we use specials exclusively for imagefilters

src/core/SkSpecialImage.h

 /*
  * Copyright 2016 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file
  */
 
 #ifndef SkSpecialImage_DEFINED
 #define SkSpecialImage_DEFINED
 
@@ skipping 87 matching lines @@
      */
     sk_sp<SkSpecialImage> makeSubset(const SkIRect& subset) const;
 
     /**
      * Extract a subset of this special image and return it as an SkImage.
      * It may or may not point to the same backing memory.
      * TODO: switch this to makeSurface once we resolved the naming issue
      */
     sk_sp<SkImage> makeTightSubset(const SkIRect& subset) const;
 
-    // These three internal methods will go away (see skbug.com/4965)
-    bool internal_getBM(SkBitmap* result);
-    static sk_sp<SkSpecialImage> internal_fromBM(const SkBitmap&, const SkSurfaceProps*);
-
     // TODO: hide this when GrLayerHoister uses SkSpecialImages more fully (see skbug.com/5063)
     /**
      *  If the SpecialImage is backed by a gpu texture, return true.
      */
     bool isTextureBacked() const;
 
     /**
      * Return the GrContext if the SkSpecialImage is GrTexture-backed
      */
     GrContext* getContext() const;
@@ skipping 20 matching lines @@
 
 private:
     const SkSurfaceProps fProps;
     const SkIRect        fSubset;
     const uint32_t       fUniqueID;
 
     typedef SkRefCnt INHERITED;
 };
 
 #endif