remove CreateLightingFilter from SkColorFilter

include/core/SkColorFilter.h

Index: include/core/SkColorFilter.h
diff --git a/include/core/SkColorFilter.h b/include/core/SkColorFilter.h
index e89b2b1e4f30ed57c84add44832ce6f5cbb87c47..c5d084a22d0d31cc44faf4fd9e79118ee6ea0c3e 100644
--- a/include/core/SkColorFilter.h
+++ b/include/core/SkColorFilter.h
@@ -106,9 +106,6 @@ public:
     */
     static SkColorFilter* CreateModeFilter(SkColor c, SkXfermode::Mode mode);
 
-    // DEPRECATED -- call this from SkColorMatrixFilter instead -- see skbug.com/4791
-    static SkColorFilter* CreateLightingFilter(SkColor mul, SkColor add);
-
     /** Construct a colorfilter whose effect is to first apply the inner filter and then apply
      *  the outer filter to the result of the inner's.
      *  The reference counts for outer and inner are incremented.