remove some unneeded artificial dependencies from configure

Originally committed as revision 12334 to svn://svn.ffmpeg.org/ffmpeg/trunk

configure

@@ -787,22 +787,9 @@ ac3_decoder_deps="gpl"
 dxa_decoder_deps="zlib"
 flashsv_decoder_deps="zlib"
 flashsv_encoder_deps="zlib"
-flv_decoder_deps="h263_decoder"
-h263_decoder_deps="h263_parser mpeg4video_parser"
-h263i_decoder_deps="h263_decoder"
-h264_decoder_deps="h264_parser"
 mpeg_xvmc_decoder_deps="xvmc"
-mpeg4_decoder_deps="h263_decoder"
-msmpeg4v1_decoder_deps="h263_decoder"
-msmpeg4v2_decoder_deps="h263_decoder"
-msmpeg4v3_decoder_deps="h263_decoder"
 png_decoder_deps="zlib"
 png_encoder_deps="zlib"
-svq3_decoder_deps="h264_parser"
-vc1_decoder_deps="h263_decoder"
-wmv1_decoder_deps="h263_decoder"
-wmv2_decoder_deps="h263_decoder"
-wmv3_decoder_deps="h263_decoder"
 zmbv_decoder_deps="zlib"
 zmbv_encoder_deps="zlib"