remove all references to legacy Config8888

include/core/SkBitmapDevice.h

Index: include/core/SkBitmapDevice.h
diff --git a/include/core/SkBitmapDevice.h b/include/core/SkBitmapDevice.h
index 076fb8ab89af3403bb2d27a311bf89a3421a41e5..df4675e5e3d4123a7ee0b633a2eb690e8ab1ceb7 100644
--- a/include/core/SkBitmapDevice.h
+++ b/include/core/SkBitmapDevice.h
@@ -188,16 +188,6 @@ protected:
         return pr;
     }
 
-    /**
-     * Implements readPixels API. The caller will ensure that:
-     *  1. bitmap has pixel config kARGB_8888_Config.
-     *  2. bitmap has pixels.
-     *  3. The rectangle (x, y, x + bitmap->width(), y + bitmap->height()) is
-     *     contained in the device bounds.
-     */
-#ifdef SK_SUPPORT_LEGACY_READPIXELSCONFIG
-    virtual bool onReadPixels(const SkBitmap&, int x, int y, SkCanvas::Config8888) SK_OVERRIDE;
-#endif
     virtual bool onReadPixels(const SkImageInfo&, void*, size_t, int x, int y) SK_OVERRIDE;
     virtual bool onWritePixels(const SkImageInfo&, const void*, size_t, int, int) SK_OVERRIDE;
     virtual void* onAccessPixels(SkImageInfo* info, size_t* rowBytes) SK_OVERRIDE;