Revert "avcodec/libaomdec: auto insert dump_extra bitstream filter"

This reverts commit e45ed155.

The Matroska spec was updated to not remove Sequence Header OBUs from key
frames, so this is no longer needed.

configure

@@ -3049,7 +3049,6 @@ h264_videotoolbox_encoder_select="videotoolbox_encoder"
 hevc_videotoolbox_encoder_deps="pthreads"
 hevc_videotoolbox_encoder_select="videotoolbox_encoder"
 libaom_av1_decoder_deps="libaom"
-libaom_av1_decoder_select="dump_extradata_bsf"
 libaom_av1_encoder_deps="libaom"
 libaom_av1_encoder_select="extract_extradata_bsf"
 libcelt_decoder_deps="libcelt"

libavcodec/libaomdec.c

@@ -232,5 +232,4 @@ AVCodec ff_libaom_av1_decoder = {
     .capabilities   = AV_CODEC_CAP_AUTO_THREADS | AV_CODEC_CAP_DR1,
     .profiles       = NULL_IF_CONFIG_SMALL(ff_av1_profiles),
     .wrapper_name   = "libaom",
-    .bsfs           = "dump_extra",
 };