avcodec/proresenc_anatoliy: Remove redundant pixel format check

ff_encode_preinit() already checked the pixel format via
AVCodec.pix_fmts.

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

libavcodec/proresenc_anatoliy.c

@@ -852,9 +852,6 @@ static av_cold int prores_encode_init(AVCodecContext *avctx)
             avctx->profile = FF_PROFILE_PRORES_4444;
             av_log(avctx, AV_LOG_INFO,
                    "encoding with ProRes 4444+ (ap4h) profile\n");
-        } else {
-            av_log(avctx, AV_LOG_ERROR, "Unknown pixel format\n");
-            return AVERROR(EINVAL);
         }
     } else if (avctx->profile < FF_PROFILE_PRORES_PROXY
             || avctx->profile > FF_PROFILE_PRORES_XQ) {