r/system-auth: Disable authselect

*authselect* is now [mandatory][0] in Fedora 36.  It cannot be
uninstalled, but it can be disabled by removing its configuration file.

[0]: https://fedoraproject.org/wiki/Changes/Make_Authselect_Mandatory

roles/system-auth/tasks/main.yml

@@ -19,6 +19,10 @@
   - postlogin
   - smartcard-auth
   - system-auth
+- name: ensure authselect is disabled
+  file:
+    path: /etc/authselect/authselect.conf
+    state: absent
 
 - name: ensure mkhomedir package is installed
   package: