remove some unneeded header includes

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@14819 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

libavcodec/ac3dec.c

@@ -33,10 +33,7 @@
 #include <string.h>
 
 #include "libavutil/crc.h"
-#include "avcodec.h"
 #include "ac3_parser.h"
-#include "bitstream.h"
-#include "dsputil.h"
 #include "ac3dec.h"
 #include "ac3dec_data.h"
 

libavcodec/ac3dec.h

@@ -28,7 +28,6 @@
 #define FFMPEG_AC3DEC_H
 
 #include "libavutil/lfg.h"
-#include "ac3tab.h"
 #include "ac3.h"
 #include "bitstream.h"
 #include "dsputil.h"