vc2enc: remove useless alignment on slice encoding

This was a leftover from before the slices were encoded in parallel.
Since the put_bits context is initialized per slice aligning it
aferwards is pointless.
Signed-off-by: Rostislav Pehlivanov <atomnuker@gmail.com>

libavcodec/vc2enc.c

@@ -749,7 +749,6 @@ static int encode_hq_slice(AVCodecContext *avctx, void *arg)
     uint8_t quants[MAX_DWT_LEVELS][4];
     int p, level, orientation;
 
-    avpriv_align_put_bits(pb);
     skip_put_bytes(pb, s->prefix_bytes);
     put_bits(pb, 8, quant_idx);