Don't set mm_flags in fft-test, since it doesn't do anything anyway.

Originally committed as revision 13968 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/fft-test.c

@@ -186,10 +186,6 @@ int main(int argc, char **argv)
     MDCTContext m1, *m = &m1;
     int fft_nbits, fft_size;
 
-#ifndef mm_flags
-    mm_flags = 0;
-#endif
-
     fft_nbits = 9;
     for(;;) {
         c = getopt(argc, argv, "hsimn:");