ASoC: SOF: compress: Remove dai_posn variable

dai_posn is set but never used. Initial intention was
to use dai_posn to shorthen one code line but it looks fine
without it too.

Fixes: c1a731c7 ("ASoC: SOF: compress: Add support for computing timestamps")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Daniel Baluta <daniel.baluta@nxp.com>
Link: https://lore.kernel.org/r/20220822174937.254873-1-daniel.baluta@oss.nxp.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sof/compress.c

@@ -327,7 +327,6 @@ static int sof_compr_pointer(struct snd_soc_component *component,
 			     struct snd_compr_stream *cstream,
 			     struct snd_compr_tstamp *tstamp)
 {
-	u64 dai_posn;
 	struct snd_sof_pcm *spcm;
 	struct snd_soc_pcm_runtime *rtd = cstream->private_data;
 	struct sof_compr_stream *sstream = cstream->runtime->private_data;
@@ -336,8 +335,6 @@ static int sof_compr_pointer(struct snd_soc_component *component,
 	if (!spcm)
 		return -EINVAL;
 
-	dai_posn = spcm->stream[cstream->direction].posn.dai_posn;
-
 	tstamp->sampling_rate = sstream->sampling_rate;
 	tstamp->copied_total = sstream->copied_total;
 	tstamp->pcm_io_frames = div_u64(spcm->stream[cstream->direction].posn.dai_posn,