fix: remove unnecessarily configured Vault passwort files

ansible.cfg

 [defaults]
 # If set, configures the path to the Vault password file as an alternative to
 # specifying --vault-password-file on the command line.
-vault_identity_list = ../lza_install_common.pass, ../slub_osquery.pass, ../lza_server_hardening.pass, ../lza_proxy.pass
+# vault_identity_list = ../lza_install_common.pass, ../slub_osquery.pass, ../lza_server_hardening.pass, ../lza_proxy.pass
+vault_identity_list = ../lza_proxy.pass
 
 # Path to default inventory file
 # Administrators can override this by using the "-i <inventoryfile>" CLI