networkd: don't automatically reload config at runtime

We don't know if the config will be consistent, so do as systemd itself and only
load config when the daemon starts (and possibly, in the future, when explicitly requested).

src/network/networkd-bridge.c

@@ -55,9 +55,6 @@ int bridge_get(Manager *manager, const char *name, Bridge **ret) {
         assert(name);
         assert(ret);
 
-        if (manager_should_reload(manager))
-                manager_load_config(manager);
-
         bridge = hashmap_get(manager->bridges, name);
         if (!bridge) {
                 *ret = NULL;

src/network/networkd-network.c

@@ -166,9 +166,6 @@ int network_get(Manager *manager, struct udev_device *device, Network **ret) {
         assert(device);
         assert(ret);
 
-        if (manager_should_reload(manager))
-                manager_load_config(manager);
-
         LIST_FOREACH(networks, network, manager->networks) {
                 if (net_match_config(network->match_mac, network->match_path,
                                         network->match_driver, network->match_type,