refactor(partitioning): remove unused register variables

roles/partitioning/tasks/btrfs.yml

@@ -56,7 +56,6 @@
         - { subvol: var_log_audit }
       loop_control:
         label: "{{ item.subvol }}"
-      register: partitioning_btrfs_subvol_result
 
     - name: Set quotas for subvolumes
       when: system_cfg.features.cis.enabled | bool
@@ -74,7 +73,6 @@
         btrfs filesystem mkswapfile --size {{ partitioning_swap_size_gb }}g --uuid clear /mnt/@swap/swapfile
       args:
         creates: /mnt/@swap/swapfile
-      register: partitioning_btrfs_swap_result
 
     - name: Unmount Partition
       ansible.posix.mount: