remove SkFloatToScalar macro

gm/gradient_matrix.cpp

Index: gm/gradient_matrix.cpp
diff --git a/gm/gradient_matrix.cpp b/gm/gradient_matrix.cpp
index 508b3eb919d44a302a89255fc7506fa84ea690bb..d1d0e42d6ea163619a3be64a2cb6ba861e938859 100644
--- a/gm/gradient_matrix.cpp
+++ b/gm/gradient_matrix.cpp
@@ -24,7 +24,7 @@ static const SkColor gColors[] = {
 };
 
 // These annoying defines are necessary, because the only other alternative
-// is to use SkIntToScalar(...) or SkFloatToScalar(...) everywhere.
+// is to use SkIntToScalar(...) everywhere.
 static const SkScalar sZero = 0;
 static const SkScalar sHalf = SK_ScalarHalf;
 static const SkScalar sOne = SK_Scalar1;