[no ci] Overlay: minor script refactoring

general/overlay/etc/init.d/S30customizer

@@ -14,9 +14,4 @@ case "$1" in
 			touch /etc/network.ok
 		fi
 		;;
-
-	*)
-		echo "Usage: $0 {start}"
-		exit 1
-		;;
 esac

general/overlay/etc/init.d/S40mdev

@@ -6,11 +6,4 @@ case "$1" in
 		echo /sbin/mdev > /proc/sys/kernel/hotplug
 		/sbin/mdev -s
 		;;
-
-	*)
-		echo "Usage: $0 {start}"
-		exit 1
-		;;
 esac
-
-exit $?

general/overlay/etc/init.d/S70vendor

@@ -1,6 +1,4 @@
 #!/bin/sh
-
-# load vendor specific drivers
 vendor=$(ipcinfo -v)
 
 log_vendor() {