avcodec/cuvid: Don't claim to decode h.263 (it doesn't)

Turns out cuvid doesn't support h.263.

configure

@@ -2552,7 +2552,6 @@ videotoolbox_hwaccel_deps="videotoolbox pthreads"
 videotoolbox_hwaccel_extralibs="-framework QuartzCore"
 xvmc_deps="X11_extensions_XvMClib_h"
 
-h263_cuvid_hwaccel_deps="cuda cuvid"
 h263_vaapi_hwaccel_deps="vaapi"
 h263_vaapi_hwaccel_select="h263_decoder"
 h263_videotoolbox_hwaccel_deps="videotoolbox"
@@ -2696,8 +2695,6 @@ scale_npp_filter_deps="cuda libnpp"
 
 nvenc_deps_any="dlopen LoadLibrary"
 nvenc_encoder_deps="nvenc"
-h263_cuvid_decoder_deps="cuda cuvid"
-h263_cuvid_decoder_select="h263_cuvid_hwaccel"
 h264_cuvid_decoder_deps="cuda cuvid"
 h264_cuvid_decoder_select="h264_mp4toannexb_bsf h264_cuvid_hwaccel"
 h264_nvenc_encoder_deps="nvenc"

libavcodec/allcodecs.c

@@ -67,7 +67,6 @@ void avcodec_register_all(void)
     initialized = 1;
 
     /* hardware accelerators */
-    REGISTER_HWACCEL(H263_CUVID,        h263_cuvid);
     REGISTER_HWACCEL(H263_VAAPI,        h263_vaapi);
     REGISTER_HWACCEL(H263_VIDEOTOOLBOX, h263_videotoolbox);
     REGISTER_HWACCEL(H264_CUVID,        h264_cuvid);
@@ -634,7 +633,6 @@ void avcodec_register_all(void)
     /* external libraries, that shouldn't be used by default if one of the
      * above is available */
     REGISTER_ENCDEC (LIBOPENH264,       libopenh264);
-    REGISTER_DECODER(H263_CUVID,        h263_cuvid);
     REGISTER_DECODER(H264_CUVID,        h264_cuvid);
     REGISTER_ENCODER(H264_NVENC,        h264_nvenc);
     REGISTER_ENCODER(H264_OMX,          h264_omx);

libavcodec/cuvid.c

@@ -664,11 +664,6 @@ static av_cold int cuvid_decode_init(AVCodecContext *avctx)
     ctx->cuparseinfo.pExtVideoInfo = &ctx->cuparse_ext;
 
     switch (avctx->codec->id) {
-#if CONFIG_H263_CUVID_DECODER
-    case AV_CODEC_ID_H263:
-        ctx->cuparseinfo.CodecType = cudaVideoCodec_MPEG4;
-        break;
-#endif
 #if CONFIG_H264_CUVID_DECODER
     case AV_CODEC_ID_H264:
         ctx->cuparseinfo.CodecType = cudaVideoCodec_H264;
@@ -895,10 +890,6 @@ static const AVOption options[] = {
 DEFINE_CUVID_CODEC(hevc, HEVC)
 #endif
 
-#if CONFIG_H263_CUVID_DECODER
-DEFINE_CUVID_CODEC(h263, H263)
-#endif
-
 #if CONFIG_H264_CUVID_DECODER
 DEFINE_CUVID_CODEC(h264, H264)
 #endif