Remove SkEncodedInfo kPreSwizzled_Color from public API

include/codec/SkEncodedInfo.h

Index: include/codec/SkEncodedInfo.h
diff --git a/include/codec/SkEncodedInfo.h b/include/codec/SkEncodedInfo.h
index 27511e1e930212a1374ad22260ab159e6bc15d4f..0c5bd0b4212a24fef4db6853ed83105a32692d5d 100644
--- a/include/codec/SkEncodedInfo.h
+++ b/include/codec/SkEncodedInfo.h
@@ -64,10 +64,6 @@ public:
         // be treated as inverted CMYK.
         kInvertedCMYK_Color,
         kYCCK_Color,
-
-        // Used internally to indicate that the decoding library has
-        // pre-swizzled to the desired output format.
-        kPreSwizzled_Color,
     };
 
     static SkEncodedInfo Make(Color color, Alpha alpha, int bitsPerComponent) {