remove unused GM flags

gm/bitmaprect.cpp

Index: gm/bitmaprect.cpp
diff --git a/gm/bitmaprect.cpp b/gm/bitmaprect.cpp
index ae505bf00d97e25ceba1cae591c440799c34cb12..8fb56f5fcaa71384cc43cd305270727342d838f1 100644
--- a/gm/bitmaprect.cpp
+++ b/gm/bitmaprect.cpp
@@ -45,13 +45,6 @@ protected:
         return SkISize::Make(640, 480);
     }
 
-#ifdef SK_CPU_ARM64
-    // Skip tiled drawing on 64-bit ARM until https://skbug.com/2908 is fixed.
-    uint32_t onGetFlags() const SK_OVERRIDE {
-        return kSkipTiled_Flag;
-    }
-#endif
-
     void onDraw(SkCanvas* canvas) SK_OVERRIDE {
         canvas->drawColor(0xFFCCCCCC);
 
@@ -271,7 +264,7 @@ protected:
         canvas->drawRect(r, paint);
         canvas->drawBitmapRect(fBM, NULL, r, NULL);
     }
-    
+
 private:
     typedef skiagm::GM INHERITED;
 };