ac3dec: Remove write-only channel_layout field from AC3DecodeContext

Signed-off-by: Diego Biurrun <diego@biurrun.de>

libavcodec/ac3dec.c

@@ -261,7 +261,6 @@ static int parse_frame_header(AC3DecodeContext *s)
     s->bit_alloc_params.sr_code     = hdr.sr_code;
     s->bitstream_mode               = hdr.bitstream_mode;
     s->channel_mode                 = hdr.channel_mode;
-    s->channel_layout               = hdr.channel_layout;
     s->lfe_on                       = hdr.lfe_on;
     s->bit_alloc_params.sr_shift    = hdr.sr_shift;
     s->sample_rate                  = hdr.sample_rate;

libavcodec/ac3dec.h

@@ -81,7 +81,6 @@ typedef struct AC3DecodeContext {
     int num_blocks;                         ///< number of audio blocks
     int bitstream_mode;                     ///< bitstream mode                         (bsmod)
     int channel_mode;                       ///< channel mode                           (acmod)
-    int channel_layout;                     ///< channel layout
     int lfe_on;                             ///< lfe channel in use
     int channel_map;                        ///< custom channel map
     int center_mix_level;                   ///< Center mix level index