Remove SK_SUPPORT_LEGACY_DEEPFLATTENING.

src/core/SkBlitter.cpp

Index: src/core/SkBlitter.cpp
diff --git a/src/core/SkBlitter.cpp b/src/core/SkBlitter.cpp
index f4669d595995099e49217cb2aacefe03af056eab..ba260ad7166c103c409a5d3bf67c60cf0ba2146a 100644
--- a/src/core/SkBlitter.cpp
+++ b/src/core/SkBlitter.cpp
@@ -714,15 +714,6 @@ public:
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(Sk3DShader)
 
 protected:
-#ifdef SK_SUPPORT_LEGACY_DEEPFLATTENING
-    Sk3DShader(SkReadBuffer& buffer) : INHERITED(buffer) {
-        fProxy = buffer.readShader();
-        // Leaving this here until we bump the picture version, though this
-        // shader should never be recorded.
-        buffer.readColor();
-    }
-#endif
-
     virtual void flatten(SkWriteBuffer& buffer) const SK_OVERRIDE {
         buffer.writeFlattenable(fProxy);
     }