Remove duplicate #includes, avcodec.h #includes common.h.

Originally committed as revision 8995 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/h263.c

@@ -34,7 +34,6 @@
 //#define DEBUG
 #include <limits.h>
 
-#include "common.h"
 #include "dsputil.h"
 #include "avcodec.h"
 #include "mpegvideo.h"

libavcodec/h264.c

@@ -26,7 +26,6 @@
  * @author Michael Niedermayer <michaelni@gmx.at>
  */
 
-#include "common.h"
 #include "dsputil.h"
 #include "avcodec.h"
 #include "mpegvideo.h"