remove SK_SCALAR_IS_[FLOAT,FIXED] and assume floats

src/core/SkFlattenableBuffers.cpp

Index: src/core/SkFlattenableBuffers.cpp
diff --git a/src/core/SkFlattenableBuffers.cpp b/src/core/SkFlattenableBuffers.cpp
index 9da4dd9ee48641769dc592ab4255f37d07bc49ca..fc38529ef7909d4ff726b5561e56e4344767640a 100644
--- a/src/core/SkFlattenableBuffers.cpp
+++ b/src/core/SkFlattenableBuffers.cpp
@@ -24,9 +24,8 @@ SkFlattenableReadBuffer::SkFlattenableReadBuffer() {
     // Set default values. These should be explicitly set by our client
     // via setFlags() if the buffer came from serialization.
     fFlags = 0;
-#ifdef SK_SCALAR_IS_FLOAT
+    // TODO: remove this flag, since we're always floats (now)
     fFlags |= kScalarIsFloat_Flag;
-#endif
     if (8 == sizeof(void*)) {
         fFlags |= kPtrIs64Bit_Flag;
     }