Delete reallyHasAlpha() from SkCodec

src/codec/SkCodecPriv.h

Index: src/codec/SkCodecPriv.h
diff --git a/src/codec/SkCodecPriv.h b/src/codec/SkCodecPriv.h
index 1b6723fd4afc15c55c928849af9c97508490a6b5..27e2a63722d8ff095911846ece0d45d46cc7479f 100644
--- a/src/codec/SkCodecPriv.h
+++ b/src/codec/SkCodecPriv.h
@@ -11,26 +11,9 @@
 #include "SkColorPriv.h"
 #include "SkColorTable.h"
 #include "SkImageInfo.h"
-#include "SkSwizzler.h"
 #include "SkTypes.h"
 #include "SkUtils.h"
 
-/*
- *
- * Helper routine for alpha result codes
- *
- */
-#define INIT_RESULT_ALPHA                       \
-    uint8_t zeroAlpha = 0;                      \
-    uint8_t maxAlpha = 0xFF;
-
-#define UPDATE_RESULT_ALPHA(alpha)              \
-    zeroAlpha |= (alpha);                       \
-    maxAlpha  &= (alpha);
-
-#define COMPUTE_RESULT_ALPHA                    \
-    SkSwizzler::GetResult(zeroAlpha, maxAlpha);
-
 // FIXME: Consider sharing with dm, nanbench, and tools.
 inline float get_scale_from_sample_size(int sampleSize) {
     return 1.0f / ((float) sampleSize);