remove SK_SCALAR_IS_[FLOAT,FIXED] and assume floats

src/animator/SkDrawGradient.cpp

Index: src/animator/SkDrawGradient.cpp
diff --git a/src/animator/SkDrawGradient.cpp b/src/animator/SkDrawGradient.cpp
index 44086e4269d9b85ab7029a706f0392bbff159da6..1b158f23c108a273c4bbe505b345a70d85af1361 100644
--- a/src/animator/SkDrawGradient.cpp
+++ b/src/animator/SkDrawGradient.cpp
@@ -14,20 +14,12 @@
 #include "SkUnitMapper.h"
 
 static SkScalar SkUnitToScalar(U16CPU x) {
-#ifdef SK_SCALAR_IS_FLOAT
     return x / 65535.0f;
-#else
-    return x + (x >> 8);
-#endif
 }
 
 static U16CPU SkScalarToUnit(SkScalar x) {
     SkScalar pin =  SkScalarPin(x, 0, SK_Scalar1);
-#ifdef SK_SCALAR_IS_FLOAT
     return (int) (pin * 65535.0f);
-#else
-    return pin - (pin >= 32768);
-#endif
 }
 
 class SkDrawGradientUnitMapper : public SkUnitMapper {