Remove SK_SUPPORT_LEGACY_DEEPFLATTENING.

src/effects/SkBlurMaskFilter.cpp

Index: src/effects/SkBlurMaskFilter.cpp
diff --git a/src/effects/SkBlurMaskFilter.cpp b/src/effects/SkBlurMaskFilter.cpp
index 5b0e60addebe25ae2bc7867d20e0976ff17c16b4..b5bcc3c5de9b9dbdba9378ec8b93790f44f7782a 100644
--- a/src/effects/SkBlurMaskFilter.cpp
+++ b/src/effects/SkBlurMaskFilter.cpp
@@ -585,16 +585,6 @@ void SkBlurMaskFilterImpl::computeFastBounds(const SkRect& src,
              src.fRight + pad, src.fBottom + pad);
 }
 
-#ifdef SK_SUPPORT_LEGACY_DEEPFLATTENING
-SkBlurMaskFilterImpl::SkBlurMaskFilterImpl(SkReadBuffer& buffer) : SkMaskFilter(buffer) {
-    fSigma = buffer.readScalar();
-    fBlurStyle = (SkBlurStyle)buffer.readInt();
-    fBlurFlags = buffer.readUInt() & SkBlurMaskFilter::kAll_BlurFlag;
-    SkASSERT(fSigma > 0);
-    SkASSERT((unsigned)fBlurStyle <= kLastEnum_SkBlurStyle);
-}
-#endif
-
 SkFlattenable* SkBlurMaskFilterImpl::CreateProc(SkReadBuffer& buffer) {
     const SkScalar sigma = buffer.readScalar();
     const unsigned style = buffer.readUInt();