proxmox-backup: don’t modify config for default SSH instance

It is disabled anyway, so trying to reload it barfs. Worry about
deduplicating roles whenever.

roles/proxmox-backup/tasks/main.yml

@@ -58,18 +58,6 @@
     mode: 0644
   notify: reload interfaces
 
-- name: Disable SSH password authentication
-  lineinfile:
-    path: /etc/ssh/sshd_config
-    regexp: '^#?{{ item.key }}'
-    line: '{{ item.key }} {{ item.value }}'
-  loop:
-    - key: PasswordAuthentication
-      value: 'no'
-    - key: PermitRootLogin
-      value: 'prohibit-password'
-  notify: reload sshd
-
 - name: Run SSH instance in management VRF
   when: interfaces | selectattr('vrf') | selectattr('vrf.name', '==', 'mgmt')
   block: