remove SK_SUPPORT_LEGACY_PIXELREF_UNFLATTENABLE code

src/core/SkPixelRef.cpp

Index: src/core/SkPixelRef.cpp
diff --git a/src/core/SkPixelRef.cpp b/src/core/SkPixelRef.cpp
index 3664dfa17f7b4d1e544bd99dac063ae01a6b1770..be46432be1461c048baa4c6a0e1b9bd000d4a9e4 100644
--- a/src/core/SkPixelRef.cpp
+++ b/src/core/SkPixelRef.cpp
@@ -108,31 +108,6 @@ SkPixelRef::SkPixelRef(const SkImageInfo& info, SkBaseMutex* mutex) : fInfo(info
     fPreLocked = false;
 }
 
-#ifdef SK_SUPPORT_LEGACY_PIXELREF_UNFLATTENABLE
-static SkImageInfo read_info(SkReadBuffer& buffer) {
-    SkImageInfo info;
-    info.unflatten(buffer);
-    return info;
-}
-
-SkPixelRef::SkPixelRef(SkReadBuffer& buffer, SkBaseMutex* mutex)
-        : INHERITED(buffer)
-        , fInfo(read_info(buffer))
-{
-    SkDEBUGCODE(SkAlphaType alphaType;)
-    SkASSERT(SkColorTypeValidateAlphaType(fInfo.colorType(), fInfo.alphaType(), &alphaType));
-    SkASSERT(fInfo.fAlphaType == alphaType);
-
-    this->setMutex(mutex);
-    fRec.zero();
-    fLockCount = 0;
-    fIsImmutable = buffer.readBool();
-    fGenerationID = buffer.readUInt();
-    fUniqueGenerationID = false;  // Conservatively assuming the original still exists.
-    fPreLocked = false;
-}
-#endif
-
 SkPixelRef::~SkPixelRef() {
     this->callGenIDChangeListeners();
 }