Document SkSurface::MakeRaster's memory initialization

src/image/SkSurface_Raster.cpp

Index: src/image/SkSurface_Raster.cpp
diff --git a/src/image/SkSurface_Raster.cpp b/src/image/SkSurface_Raster.cpp
index 8c9c154a9cea292b456dc5a129b0334ddd08da2f..c1be0b7fc5ec577ac8867e1727a1273e50bd38e4 100644
--- a/src/image/SkSurface_Raster.cpp
+++ b/src/image/SkSurface_Raster.cpp
@@ -205,7 +205,3 @@ sk_sp<SkSurface> SkSurface::MakeRaster(const SkImageInfo& info, size_t rowBytes,
     }
     return sk_make_sp<SkSurface_Raster>(pr, props);
 }
-
-sk_sp<SkSurface> SkSurface::MakeRaster(const SkImageInfo& info, const SkSurfaceProps* props) {
-    return MakeRaster(info, 0, props);
-}