hal: Remove repeated unwanted code

- Remove the unwanted repeated code which happen during
merge

CRs-Fixed: 587086

Change-Id: If6c298b2006a2d130b2c88e4ca268eddea3acbcc
diff --git a/hal/audio_hw.c b/hal/audio_hw.c
index 96691e6..937c79b 100644
--- a/hal/audio_hw.c
+++ b/hal/audio_hw.c
@@ -395,12 +395,6 @@
             }
         }
 
-        list_for_each(node, &adev->usecase_list) {
-            usecase = node_to_item(node, struct audio_usecase, list);
-            if (switch_device[usecase->id]) {
-                enable_snd_device(adev, snd_device, false);
-            }
-        }
         /* Make sure new snd device is enabled before re-routing the streams */
         audio_route_update_mixer(adev->audio_route);