40network: Don't include 40network by default

commit 7347391 ('network-legacy: split off from network module')
splitted network function to network-legacy and removed check() function
of 40network. This caused 40network to be included even if network is
not needed.

Signed-off-by: Kairui Song <kasong@redhat.com>

modules.d/40network/module-setup.sh

@@ -1,5 +1,10 @@
 #!/bin/bash
 
+# called by dracut
+check() {
+    return 255
+}
+
 # called by dracut
 depends() {
     echo -n "kernel-network-modules "