avcodec/ffv1enc: mark RGB48 support as non-experimental

Remove the 2nd mark, 1st mark was removed in 58e16a4

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

libavcodec/ffv1enc.c

@@ -657,10 +657,6 @@ FF_ENABLE_DEPRECATION_WARNINGS
         s->chroma_planes = 1;
         if (s->bits_per_raw_sample >= 16) {
             s->use32bit = 1;
-            if (avctx->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
-                av_log(avctx, AV_LOG_ERROR, "16bit RGB is experimental and under development, only use it for experiments\n");
-                return AVERROR_INVALIDDATA;
-            }
         }
         s->version = FFMAX(s->version, 1);
         break;