Remove deprecated function.

include/core/SkImageDecoder.h

Index: include/core/SkImageDecoder.h
diff --git a/include/core/SkImageDecoder.h b/include/core/SkImageDecoder.h
index bec40631e7c4813394729adb4668011d33156a92..2300f6d27d0d7f98b0a8341f427a4a51f3e601dd 100644
--- a/include/core/SkImageDecoder.h
+++ b/include/core/SkImageDecoder.h
@@ -288,11 +288,6 @@ public:
      */
     bool decodeSubset(SkBitmap* bm, const SkIRect& subset, SkBitmap::Config pref);
 
-    SK_ATTR_DEPRECATED("use decodeSubset() instead")
-    bool decodeRegion(SkBitmap* bitmap, const SkIRect& rect, SkBitmap::Config pref) {
-        return this->decodeSubset(bitmap, rect, pref);
-    }
-
     /** Given a stream, this will try to find an appropriate decoder object.
         If none is found, the method returns NULL.
     */