avcodec/huffyuvenc: Remove redundant call

All codecs here have the FF_CODEC_CAP_INIT_CLEANUP set,
so ff_huffyuv_common_end() will be called automatically
in encode_end() on error.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

libavcodec/huffyuvenc.c

@@ -392,7 +392,6 @@ static av_cold int encode_init(AVCodecContext *avctx)
     }
 
     if (ff_huffyuv_alloc_temp(s)) {
-        ff_huffyuv_common_end(s);
         return AVERROR(ENOMEM);
     }