Fix FastConvertYUVToABGRRow_SSSE3 for posix.

Extraneous lines in assembly code.
Review URL: http://webrtc-codereview.appspot.com/279013

git-svn-id: http://libyuv.googlecode.com/svn/trunk@87 16f28f9a-4ce2-e073-06de-1de4eb20be90

source/row_posix.cc

@@ -474,9 +474,6 @@ void OMITFP FastConvertYUVToABGRRow_SSSE3(const uint8* y_buf,  // rdi
 
   "1:                                          \n"
     YUVTORGB
-    "packuswb    %%xmm0,%%xmm0                 \n"
-    "packuswb    %%xmm1,%%xmm1                 \n"
-    "packuswb    %%xmm2,%%xmm2                 \n"
     "punpcklbw   %%xmm1,%%xmm2                 \n"
     "punpcklbw   %%xmm5,%%xmm0                 \n"
     "movdqa      %%xmm2,%%xmm1                 \n"