selinux: remove unused variabled in the netport, netnode, and netif caches

This patch removes the unused return code variable in the netport,
netnode, and netif initialization functions.

Reported-by: fengguang.wu@intel.com
Signed-off-by: Paul Moore <pmoore@redhat.com>

security/selinux/netport.c

@@ -237,7 +237,6 @@ void sel_netport_flush(void)
 static __init int sel_netport_init(void)
 {
 	int iter;
-	int ret;
 
 	if (!selinux_enabled)
 		return 0;
@@ -247,7 +246,7 @@ static __init int sel_netport_init(void)
 		sel_netport_hash[iter].size = 0;
 	}
 
-	return ret;
+	return 0;
 }
 
 __initcall(sel_netport_init);