Remove distance field flag from SkPaint

Review URL: https://codereview.chromium.org/1192413005
diff --git a/gm/dftext.cpp b/gm/dftext.cpp
index 63e7cdf..0ee01e3 100755
--- a/gm/dftext.cpp
+++ b/gm/dftext.cpp
@@ -72,9 +72,7 @@
         SkPaint paint;
         paint.setAntiAlias(true);
         paint.setSubpixelText(true);
-#if !SK_SUPPORT_GPU
-        paint.setDistanceFieldTextTEMP(true);
-#endif
+
         sk_tool_utils::set_portable_typeface(&paint, "Times New Roman", SkTypeface::kNormal);
 
         const char* text = "Hamburgefons";