borg_client: remove "compact_after_prune" toggle

rsync.net has upgraded to borg 1.2 and we can now run borg compact on
both rsync.net and the Hetzner storage box.

Fixes: 17927c9a ("borg_client: run compact after pruning on borg 1.2")

roles/borg_client/defaults/main.yml

@@ -3,9 +3,7 @@ backup_hosts:
     dir: "~/repo"
     suffix: ""
     borg_cmd: "borg"
-    compact_after_prune: true
   - host: "ssh://zh1905@zh1905.rsync.net:22"
     dir: "~/backup/{{ inventory_hostname }}"
     suffix: "-offsite"
     borg_cmd: "borg --remote-path=borg1"
-    compact_after_prune: false # not upgraded to borg 1.2 yet

roles/borg_client/templates/borg-backup.sh.j2

@@ -91,6 +91,4 @@ fi
 
 {{ item['borg_cmd'] }} prune -v {{ item['host'] }}/{{ item['dir'] }} --keep-daily=7 --keep-weekly=4 --keep-monthly=6
 
-{% if item['compact_after_prune'] %}
 {{ item['borg_cmd'] }} compact -v {{ item['host'] }}/{{ item['dir'] }}
-{% endif %}