etc/linux-systemd: Remove bogus dependency on networking for user unit

GitHub-Pull-Request: https://github.com/syncthing/syncthing/pull/3627

etc/linux-systemd/user/syncthing.service

@@ -1,7 +1,6 @@
 [Unit]
 Description=Syncthing - Open Source Continuous File Synchronization
 Documentation=man:syncthing(1)
-After=network.target
 Wants=syncthing-inotify.service
 
 [Service]