avcodec/y41penc: Remove empty close function

Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>

libavcodec/y41penc.c

@@ -75,11 +75,6 @@ static int y41p_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
     return 0;
 }
 
-static av_cold int y41p_encode_close(AVCodecContext *avctx)
-{
-    return 0;
-}
-
 AVCodec ff_y41p_encoder = {
     .name         = "y41p",
     .long_name    = NULL_IF_CONFIG_SMALL("Uncompressed YUV 4:1:1 12-bit"),
@@ -87,7 +82,6 @@ AVCodec ff_y41p_encoder = {
     .id           = AV_CODEC_ID_Y41P,
     .init         = y41p_encode_init,
     .encode2      = y41p_encode_frame,
-    .close        = y41p_encode_close,
     .pix_fmts     = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUV411P,
                                                  AV_PIX_FMT_NONE },
 };