Remove unused libavutil/random.h #include.

Originally committed as revision 18067 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/nellymoser.c

@@ -32,7 +32,6 @@
  */
 
 #include "nellymoser.h"
-#include "libavutil/random.h"
 #include "avcodec.h"
 #include "dsputil.h"