Remove SK_SUPPORT_LEGACY_DEEPFLATTENING.

gm/imagefiltersgraph.cpp

Index: gm/imagefiltersgraph.cpp
diff --git a/gm/imagefiltersgraph.cpp b/gm/imagefiltersgraph.cpp
index 8af268e5681a9777e77fc6cf1a4f5803b07bf80c..8469a43b59e824d52d02d29a377c9edb59ed3149 100644
--- a/gm/imagefiltersgraph.cpp
+++ b/gm/imagefiltersgraph.cpp
@@ -29,11 +29,7 @@ public:
     public:
         Registrar() {
             SkFlattenable::Register("SimpleOffsetFilter",
-#ifdef SK_SUPPORT_LEGACY_DEEPFLATTENING
-                                    SimpleOffsetFilter::DeepCreateProc,
-#else
                                     SimpleOffsetFilter::CreateProc,
-#endif
                                     SimpleOffsetFilter::GetFlattenableType());
         }
     };
@@ -69,14 +65,6 @@ public:
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SimpleOffsetFilter);
 
 protected:
-#ifdef SK_SUPPORT_LEGACY_DEEPFLATTENING
-    explicit SimpleOffsetFilter(SkReadBuffer& buffer)
-    : SkImageFilter(1, buffer) {
-        fDX = buffer.readScalar();
-        fDY = buffer.readScalar();
-    }
-#endif
-
     virtual void flatten(SkWriteBuffer& buffer) const SK_OVERRIDE {
         this->INHERITED::flatten(buffer);
         buffer.writeScalar(fDX);