Fix broken slxos_config due to changed backup options (#58804)

(cherry picked from commit 5b2d1cc24d)

changelogs/fragments/slxos_config_fix.yaml

@@ -0,0 +1,2 @@
+bugfixes:
+- Fix broken slxos_config due to changed backup options (https://github.com/ansible/ansible/pull/58804).

lib/ansible/plugins/action/slxos_config.py

@@ -22,8 +22,6 @@ __metaclass__ = type
 import re
 
 from ansible.plugins.action.network import ActionModule as ActionNetworkModule
-from ansible.module_utils._text import to_text
-from ansible.module_utils.network.common.backup import write_backup, handle_template
 
 PRIVATE_KEYS_RE = re.compile('__.+__')