remove SK_SUPPORT_LEGACY_DEVICE_CONFIG code

src/utils/SkGatherPixelRefsAndRects.h

Index: src/utils/SkGatherPixelRefsAndRects.h
diff --git a/src/utils/SkGatherPixelRefsAndRects.h b/src/utils/SkGatherPixelRefsAndRects.h
index 24111ddfb6a98a502bf3612d5f6b5ab8be2e59d7..bd6f2e54e6124bc935ebc3dde563e595220dd192 100644
--- a/src/utils/SkGatherPixelRefsAndRects.h
+++ b/src/utils/SkGatherPixelRefsAndRects.h
@@ -38,11 +38,6 @@ public:
     virtual int width() const SK_OVERRIDE { return fSize.width(); }
     virtual int height() const SK_OVERRIDE { return fSize.height(); }
     virtual bool isOpaque() const SK_OVERRIDE { return false; }
-#ifdef SK_SUPPORT_LEGACY_DEVICE_CONFIG
-    virtual SkBitmap::Config config() const SK_OVERRIDE {
-        return SkBitmap::kNo_Config;
-    }
-#endif
     virtual SkImageInfo imageInfo() const SK_OVERRIDE {
         return fEmptyBitmap.info();
     }