improve logical volume size calculation

roles/cleanup/tasks/main.yml

@@ -1,11 +1,4 @@
 ---
-- name: Unmount /mnt recursively
-  when: os not in ['rhel8', 'rhel9']
-  become: false
-  ansible.builtin.command: umount -l /mnt
-  changed_when: result.rc == 0
-  register: result
-
 - name: Setup Cleanup
   when: hypervisor == "proxmox"
   delegate_to: localhost