remove SK_SUPPORT_LEGACY_WRITEPIXELSCONFIG -- dead code

src/utils/SkPictureUtils.cpp

Index: src/utils/SkPictureUtils.cpp
diff --git a/src/utils/SkPictureUtils.cpp b/src/utils/SkPictureUtils.cpp
index 23d7afd7a210ddcf3bc29904478316a284094baa..78d70ca4ebfdacee50bf67a7f5796ca28dd0c013 100644
--- a/src/utils/SkPictureUtils.cpp
+++ b/src/utils/SkPictureUtils.cpp
@@ -85,13 +85,6 @@ public:
         nothing_to_do();
     }
 
-#ifdef SK_SUPPORT_LEGACY_WRITEPIXELSCONFIG
-    virtual void writePixels(const SkBitmap& bitmap, int x, int y,
-                             SkCanvas::Config8888 config8888) SK_OVERRIDE {
-        not_supported();
-    }
-#endif
-
     virtual void drawPaint(const SkDraw&, const SkPaint& paint) SK_OVERRIDE {
         this->addBitmapFromPaint(paint);
     }