coccinelle: Drop pm_runtime_barrier() error code checks

This function doesn't return anything any more, so the compiler would
notice any bad error handling before any cocci script would.

Signed-off-by: Brian Norris <briannorris@chromium.org>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Link: https://patch.msgid.link/20251202193129.1411419-3-briannorris@chromium.org
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

scripts/coccinelle/api/pm_runtime.cocci

@@ -37,7 +37,6 @@ ret@p = \(pm_runtime_idle\|
 	pm_runtime_put_sync_autosuspend\|
 	pm_runtime_set_active\|
 	pm_schedule_suspend\|
-	pm_runtime_barrier\|
 	pm_generic_runtime_suspend\|
 	pm_generic_runtime_resume\)(...);
 ...