Remove unused variables.

Originally committed as revision 17083 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/vcr1.c

@@ -123,7 +123,6 @@ static int encode_frame(AVCodecContext *avctx, unsigned char *buf, int buf_size,
     AVFrame *pict = data;
     AVFrame * const p= (AVFrame*)&a->picture;
     int size;
-    int mb_x, mb_y;
 
     *p = *pict;
     p->pict_type= FF_I_TYPE;