remove Proxy entrypoints for canHandleFilter

include/core/SkImageFilter.h

Index: include/core/SkImageFilter.h
diff --git a/include/core/SkImageFilter.h b/include/core/SkImageFilter.h
index b7cc07ea9293f6292acc6b91d0e4ed252fad7b64..55a504ced29f7a64470b9701d12fc56c4e62098c 100644
--- a/include/core/SkImageFilter.h
+++ b/include/core/SkImageFilter.h
@@ -83,8 +83,6 @@ public:
         virtual ~Proxy() {};
 
         virtual SkBaseDevice* createDevice(int width, int height) = 0;
-        // returns true if the proxy can handle this filter natively
-        virtual bool canHandleImageFilter(const SkImageFilter*) = 0;
         // returns true if the proxy handled the filter itself. if this returns
         // false then the filter's code will be called.
         virtual bool filterImage(const SkImageFilter*, const SkBitmap& src,