ASoC: intel: Remove unused variable hsw

The recent fix left a variable declaration without usage.
  sound/soc/intel/haswell/sst-haswell-pcm.c:1349:18: warning: unused variable ‘hsw’ [-Wunused-variable]

Fixes: edd8ed496b98 ('ASoC: Intel: handle haswell pcm suspend including runtime modules freeing')
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/soc/intel/haswell/sst-haswell-pcm.c b/sound/soc/intel/haswell/sst-haswell-pcm.c
index e593e7a..1aa819c 100644
--- a/sound/soc/intel/haswell/sst-haswell-pcm.c
+++ b/sound/soc/intel/haswell/sst-haswell-pcm.c
@@ -1346,7 +1346,6 @@
 static int hsw_pcm_prepare(struct device *dev)
 {
 	struct hsw_priv_data *pdata = dev_get_drvdata(dev);
-	struct sst_hsw *hsw = pdata->hsw;
 	struct hsw_pcm_data *pcm_data;
 	int i, err;