Remove unused method

Test: builds

Change-Id: I8ad660f083a57f30db5ed0e2fe777286720033ca
diff --git a/core/jni/android/graphics/Bitmap.cpp b/core/jni/android/graphics/Bitmap.cpp
index 467ec37..a47062e 100755
--- a/core/jni/android/graphics/Bitmap.cpp
+++ b/core/jni/android/graphics/Bitmap.cpp
@@ -1195,13 +1195,6 @@
     return JNI_TRUE;
 }
 
-static jlong Bitmap_refPixelRef(JNIEnv* env, jobject, jlong bitmapHandle) {
-    LocalScopedBitmap bitmap(bitmapHandle);
-    SkPixelRef& pixelRef = bitmap->bitmap();
-    pixelRef.ref();
-    return reinterpret_cast<jlong>(&pixelRef);
-}
-
 static void Bitmap_prepareToDraw(JNIEnv* env, jobject, jlong bitmapPtr) {
     LocalScopedBitmap bitmapHandle(bitmapPtr);
     if (!bitmapHandle.valid()) return;
@@ -1269,7 +1262,6 @@
     {   "nativeCopyPixelsFromBuffer", "(JLjava/nio/Buffer;)V",
                                             (void*)Bitmap_copyPixelsFromBuffer },
     {   "nativeSameAs",             "(JJ)Z", (void*)Bitmap_sameAs },
-    {   "nativeRefPixelRef",        "(J)J", (void*)Bitmap_refPixelRef },
     {   "nativePrepareToDraw",      "(J)V", (void*)Bitmap_prepareToDraw },
     {   "nativeGetAllocationByteCount", "(J)I", (void*)Bitmap_getAllocationByteCount },
 };
@@ -1283,4 +1275,4 @@
     gBitmap_getAllocationByteCountMethodID = env->GetMethodID(gBitmap_class, "getAllocationByteCount", "()I");
     return android::RegisterMethodsOrDie(env, "android/graphics/Bitmap", gBitmapMethods,
                                          NELEM(gBitmapMethods));
-}
\ No newline at end of file
+}