Revert "Allow supporting 1 older PICTURE_VERSION."

src/core/SkOrderedReadBuffer.h

Index: src/core/SkOrderedReadBuffer.h
diff --git a/src/core/SkOrderedReadBuffer.h b/src/core/SkOrderedReadBuffer.h
index f59b9bb7bbfc559d9e724b0c4627a15f96e4298f..c609ec8be267d8304e232d050f3872671e7f7ac8 100644
--- a/src/core/SkOrderedReadBuffer.h
+++ b/src/core/SkOrderedReadBuffer.h
@@ -27,8 +27,6 @@ public:
 
     virtual SkOrderedReadBuffer* getOrderedBinaryBuffer() SK_OVERRIDE { return this; }
 
-    void setPictureVersion(uint32_t version);
-
     SkReader32* getReader32() { return &fReader; }
 
     uint32_t size() { return fReader.size(); }
@@ -123,7 +121,6 @@ private:
     int                     fFactoryCount;
 
     SkPicture::InstallPixelRefProc fBitmapDecoder;
-    uint32_t fPictureVersion;
 
     typedef SkFlattenableReadBuffer INHERITED;
 };