orange: drop cgit/git service

orange's autoswitch was failing activation: the git service's
mkdir /var/lib/git hit a symlink loop (a stale dangling
`state/git -> ../../var/state/git` link that loops because the container
bind-mounts both /var/lib and /var/state to the same state dir).

cgit is being retired, so remove the services/git import entirely. This
also unblocks orange's autoswitch (it no longer touches /var/lib/git).

Assisted-by: Claude Code (claude-opus-4-8[1m])