Refactor cleanup steps to use cleanup_lxc function (#9354)

install/nginxproxymanager-install.sh

@@ -168,14 +168,9 @@ sed -i 's/user npm/user root/g; s/^pid/#pid/g' /usr/local/openresty/nginx/conf/n
 sed -r -i 's/^([[:space:]]*)su npm npm/\1#su npm npm/g;' /etc/logrotate.d/nginx-proxy-manager
 systemctl enable -q --now openresty
 systemctl enable -q --now npm
+systemctl restart openresty
 msg_ok "Started Services"
 
 motd_ssh
 customize
-
-msg_info "Cleaning up"
-systemctl restart openresty
-$STD apt -y autoremove
-$STD apt -y autoclean
-$STD apt -y clean
-msg_ok "Cleaned"
+cleanup_lxc