Remove SK_SUPPORT_LEGACY_DEEPFLATTENING.

src/effects/SkPixelXorXfermode.cpp

Index: src/effects/SkPixelXorXfermode.cpp
diff --git a/src/effects/SkPixelXorXfermode.cpp b/src/effects/SkPixelXorXfermode.cpp
index 68b5306a5262cf1e6872dcecb9bc15ffd5ea69fa..2a6ac47aac4fb8e34a948ed2c8debeefd9cf9947 100644
--- a/src/effects/SkPixelXorXfermode.cpp
+++ b/src/effects/SkPixelXorXfermode.cpp
@@ -25,12 +25,6 @@ void SkPixelXorXfermode::flatten(SkWriteBuffer& wb) const {
     wb.writeColor(fOpColor);
 }
 
-#ifdef SK_SUPPORT_LEGACY_DEEPFLATTENING
-SkPixelXorXfermode::SkPixelXorXfermode(SkReadBuffer& rb) : INHERITED(rb) {
-    fOpColor = rb.readColor();
-}
-#endif
-
 SkFlattenable* SkPixelXorXfermode::CreateProc(SkReadBuffer& buffer) {
     return Create(buffer.readColor());
 }