Cleanup: Remove unneeded media/ SSE2 checks and unused code. (try 2)

media/base/simd/filter_yuv.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MEDIA_BASE_SIMD_FILTER_YUV_H_
 #define MEDIA_BASE_SIMD_FILTER_YUV_H_
 
 #include "base/basictypes.h"
 #include "media/base/media_export.h"
 
 namespace media {
 
 // These methods are exported for testing purposes only.  Library users should
 // only call the methods listed in yuv_convert.h.
 
 MEDIA_EXPORT void FilterYUVRows_C(uint8* ybuf,
                                   const uint8* y0_ptr,
                                   const uint8* y1_ptr,
                                   int source_width,
                                   int source_y_fraction);
 
-MEDIA_EXPORT void FilterYUVRows_MMX(uint8* ybuf,
-                                    const uint8* y0_ptr,
-                                    const uint8* y1_ptr,
-                                    int source_width,
-                                    int source_y_fraction);
-
 MEDIA_EXPORT void FilterYUVRows_SSE2(uint8* ybuf,
                                      const uint8* y0_ptr,
                                      const uint8* y1_ptr,
                                      int source_width,
                                      int source_y_fraction);
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_SIMD_FILTER_YUV_H_