Remove SkBitmapHeap and SkBitmapHeapReader. They're unused.

src/core/SkReadBuffer.h

Index: src/core/SkReadBuffer.h
diff --git a/src/core/SkReadBuffer.h b/src/core/SkReadBuffer.h
index 607f7d843faf5686859326458523321a33b8cde1..c853c0003623d0adfa6142f49d25cf8e226bf53e 100644
--- a/src/core/SkReadBuffer.h
+++ b/src/core/SkReadBuffer.h
@@ -8,7 +8,6 @@
 #ifndef SkReadBuffer_DEFINED
 #define SkReadBuffer_DEFINED
 
-#include "SkBitmapHeap.h"
 #include "SkColorFilter.h"
 #include "SkData.h"
 #include "SkDrawLooper.h"
@@ -176,10 +175,6 @@ public:
 
     virtual SkTypeface* readTypeface();
 
-    void setBitmapStorage(SkBitmapHeapReader* bitmapStorage) {
-        SkRefCnt_SafeAssign(fBitmapStorage, bitmapStorage);
-    }
-
     void setTypefaceArray(SkTypeface* array[], int count) {
         fTFArray = array;
         fTFCount = count;
@@ -255,7 +250,6 @@ private:
 
     void* fMemoryPtr;
 
-    SkBitmapHeapReader* fBitmapStorage;
     SkTypeface** fTFArray;
     int        fTFCount;