Remove SK_SUPPORT_LEGACY_DEEPFLATTENING.

src/effects/SkMorphologyImageFilter.cpp

Index: src/effects/SkMorphologyImageFilter.cpp
diff --git a/src/effects/SkMorphologyImageFilter.cpp b/src/effects/SkMorphologyImageFilter.cpp
index 9c97c35bc27601dbd1d141f39774ad9c80e09e80..3d27d10ee12197d52d9cf9ffd4d3f2f369ec9b12 100644
--- a/src/effects/SkMorphologyImageFilter.cpp
+++ b/src/effects/SkMorphologyImageFilter.cpp
@@ -22,16 +22,6 @@
 #include "effects/Gr1DKernelEffect.h"
 #endif
 
-#ifdef SK_SUPPORT_LEGACY_DEEPFLATTENING
-SkMorphologyImageFilter::SkMorphologyImageFilter(SkReadBuffer& buffer)
-  : INHERITED(1, buffer) {
-    fRadius.fWidth = buffer.readInt();
-    fRadius.fHeight = buffer.readInt();
-    buffer.validate((fRadius.fWidth >= 0) &&
-                    (fRadius.fHeight >= 0));
-}
-#endif
-
 SkMorphologyImageFilter::SkMorphologyImageFilter(int radiusX,
                                                  int radiusY,
                                                  SkImageFilter* input,