ffplay: remove options skiploop, skipidct, skipframe

The corresponding codec options (skip_loop, skip_idct, skip_frame) can be
set in a more flexible way.

This technically causes a user interface break, but since the options
were not even documented and we just released a major version that should
not be a serious issue.

ffplay.c

@@ -296,9 +296,6 @@ static int fast = 0;
 static int genpts = 0;
 static int lowres = 0;
 static int idct = FF_IDCT_AUTO;
-static enum AVDiscard skip_frame       = AVDISCARD_DEFAULT;
-static enum AVDiscard skip_idct        = AVDISCARD_DEFAULT;
-static enum AVDiscard skip_loop_filter = AVDISCARD_DEFAULT;
 static int error_concealment = 3;
 static int decoder_reorder_pts = -1;
 static int autoexit;
@@ -2476,9 +2473,6 @@ static int stream_component_open(VideoState *is, int stream_index)
         avctx->lowres= codec->max_lowres;
     }
     avctx->idct_algo         = idct;
-    avctx->skip_frame        = skip_frame;
-    avctx->skip_idct         = skip_idct;
-    avctx->skip_loop_filter  = skip_loop_filter;
     avctx->error_concealment = error_concealment;
 
     if(avctx->lowres) avctx->flags |= CODEC_FLAG_EMU_EDGE;
@@ -3381,9 +3375,6 @@ static const OptionDef options[] = {
     { "genpts", OPT_BOOL | OPT_EXPERT, { &genpts }, "generate pts", "" },
     { "drp", OPT_INT | HAS_ARG | OPT_EXPERT, { &decoder_reorder_pts }, "let decoder reorder pts 0=off 1=on -1=auto", ""},
     { "lowres", OPT_INT | HAS_ARG | OPT_EXPERT, { &lowres }, "", "" },
-    { "skiploop", OPT_INT | HAS_ARG | OPT_EXPERT, { &skip_loop_filter }, "", "" },
-    { "skipframe", OPT_INT | HAS_ARG | OPT_EXPERT, { &skip_frame }, "", "" },
-    { "skipidct", OPT_INT | HAS_ARG | OPT_EXPERT, { &skip_idct }, "", "" },
     { "idct", OPT_INT | HAS_ARG | OPT_EXPERT, { &idct }, "set idct algo",  "algo" },
     { "ec", OPT_INT | HAS_ARG | OPT_EXPERT, { &error_concealment }, "set error concealment options",  "bit_mask" },
     { "sync", HAS_ARG | OPT_EXPERT, { .func_arg = opt_sync }, "set audio-video sync. type (type=audio/video/ext)", "type" },