Remove dead SK_SUPPORT_LEGACY_PICTURESHADER_ROUNDING code

This flag is no longer used.

Change-Id: I239e756f7945f0848d12409f0eb8d3077651a4cf
Reviewed-on: https://skia-review.googlesource.com/62740
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Florin Malita <fmalita@chromium.org>
diff --git a/src/shaders/SkPictureShader.cpp b/src/shaders/SkPictureShader.cpp
index 00985a7..1a86af6 100644
--- a/src/shaders/SkPictureShader.cpp
+++ b/src/shaders/SkPictureShader.cpp
@@ -233,11 +233,7 @@
     }
 #endif
 
-#ifdef SK_SUPPORT_LEGACY_PICTURESHADER_ROUNDING
-    const SkISize tileSize = scaledSize.toRound();
-#else
     const SkISize tileSize = scaledSize.toCeil();
-#endif
     if (tileSize.isEmpty()) {
         return SkShader::MakeEmptyShader();
     }