Revert of Add SSE4 optimization of S32A_Opaque_Blitrow

src/opts/SkBlitRow_opts_SSE4.h

Index: src/opts/SkBlitRow_opts_SSE4.h
diff --git a/src/opts/SkBlitRow_opts_SSE4.h b/src/opts/SkBlitRow_opts_SSE4.h
deleted file mode 100644
index 5ff3cdd354addd98b8e14b7a5708607352a74131..0000000000000000000000000000000000000000
--- a/src/opts/SkBlitRow_opts_SSE4.h
+++ /dev/null
@@ -1,25 +0,0 @@
-/*
- * Copyright 2013 The Android Open Source Project
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#ifndef SkBlitRow_opts_SSE4_DEFINED
-#define SkBlitRow_opts_SSE4_DEFINED
-
-#include "SkBlitRow.h"
-
-/* Check if we are able to build assembly code, GCC/AT&T syntax.
- * Had problems with LLVM-GCC 4.2.
- */
-#if defined(__clang__) || (defined(__GNUC__) && !defined(SK_BUILD_FOR_MAC))
-extern "C" void S32A_Opaque_BlitRow32_SSE4_asm(SkPMColor* SK_RESTRICT dst,
-                                               const SkPMColor* SK_RESTRICT src,
-                                               int count, U8CPU alpha);
-
-#define SK_ATT_ASM_SUPPORTED
-#endif
-
-#endif
-