avcodec/hevc: remove unused variable

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

libavcodec/hevc.c

@@ -1047,7 +1047,6 @@ static int hls_transform_tree(HEVCContext *s, int x0, int y0,
 static int hls_pcm_sample(HEVCContext *s, int x0, int y0, int log2_cb_size)
 {
     //TODO: non-4:2:0 support
-    HEVCLocalContext *lc = s->HEVClc;
     GetBitContext gb;
     int cb_size   = 1 << log2_cb_size;
     int stride0   = s->frame->linesize[0];