xface: remove unused stuff, fix related warnings

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavcodec/xfacedec.c

@@ -92,8 +92,6 @@ typedef struct XFaceContext {
 
 static av_cold int xface_decode_init(AVCodecContext *avctx)
 {
-    XFaceContext *xface = avctx->priv_data;
-
     if (avctx->width || avctx->height) {
         if (avctx->width != XFACE_WIDTH || avctx->height != XFACE_HEIGHT) {
             av_log(avctx, AV_LOG_ERROR,
@@ -110,13 +108,6 @@ static av_cold int xface_decode_init(AVCodecContext *avctx)
     return 0;
 }
 
-static av_cold int xface_decode_close(AVCodecContext *avctx)
-{
-    XFaceContext *xface = avctx->priv_data;
-
-    return 0;
-}
-
 static int xface_decode_frame(AVCodecContext *avctx,
                               void *data, int *got_frame,
                               AVPacket *avpkt)
@@ -191,7 +182,6 @@ AVCodec ff_xface_decoder = {
     .id             = AV_CODEC_ID_XFACE,
     .priv_data_size = sizeof(XFaceContext),
     .init           = xface_decode_init,
-    .close          = xface_decode_close,
     .decode         = xface_decode_frame,
     .pix_fmts       = (const enum AVPixelFormat[]) { AV_PIX_FMT_MONOWHITE, AV_PIX_FMT_NONE },
     .long_name      = NULL_IF_CONFIG_SMALL("X-face image"),