remove SK_SCALAR_IS_[FLOAT,FIXED] and assume floats

src/ports/SkHarfBuzzFont.cpp

Index: src/ports/SkHarfBuzzFont.cpp
diff --git a/src/ports/SkHarfBuzzFont.cpp b/src/ports/SkHarfBuzzFont.cpp
index 8f483f5d2f587d5a83c7f54c7a0bc5ba370d3ee8..95b9e445a013ab9a8ff953a490a583ebcbfe182c 100644
--- a/src/ports/SkHarfBuzzFont.cpp
+++ b/src/ports/SkHarfBuzzFont.cpp
@@ -14,12 +14,7 @@
 
 // HB_Fixed is a 26.6 fixed point format.
 static inline HB_Fixed SkScalarToHarfbuzzFixed(SkScalar value) {
-#ifdef SK_SCALAR_IS_FLOAT
     return static_cast<HB_Fixed>(value * 64);
-#else
-    // convert .16 to .6
-    return value >> (16 - 6);
-#endif
 }
 
 static HB_Bool stringToGlyphs(HB_Font hbFont, const HB_UChar16* characters,