ASoC: dapm: Remove unneeded variable ret returning 0

This patch fixes coccicheck report:
	Unneeded variable: "ret". Return "0" on line 2817

Remove unneccesary variable ret created to return zero.
Signed-off-by: Rajan Vaja <rajan.vaja@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/soc-dapm.c

@@ -2805,7 +2805,7 @@ EXPORT_SYMBOL_GPL(snd_soc_dapm_add_routes);
 int snd_soc_dapm_del_routes(struct snd_soc_dapm_context *dapm,
 			    const struct snd_soc_dapm_route *route, int num)
 {
-	int i, ret = 0;
+	int i;
 
 	mutex_lock_nested(&dapm->card->dapm_mutex, SND_SOC_DAPM_CLASS_INIT);
 	for (i = 0; i < num; i++) {
@@ -2814,7 +2814,7 @@ int snd_soc_dapm_del_routes(struct snd_soc_dapm_context *dapm,
 	}
 	mutex_unlock(&dapm->card->dapm_mutex);
 
-	return ret;
+	return 0;
 }
 EXPORT_SYMBOL_GPL(snd_soc_dapm_del_routes);