remove reference to appcred authenticator

Author: scrungus

environments/ecmwf-base/inventory/group_vars/all/variables.yml

@@ -99,11 +99,6 @@ azimuth_authenticator_password_enabled: true
 # The label for the password authenticator
 azimuth_authenticator_password_label: "Username + Password"
 
-# Whether the appcred authenticator should be enabled (not enabled by default)
-azimuth_authenticator_appcred_enabled: false
-# The label for the appcred authenticator
-azimuth_authenticator_appcred_label: "Application Credential"
-
 # Whether the federated authenticator should be enabled (not enabled by default)
 azimuth_authenticator_federated_enabled: false
 # The label for the federated authenticator
@@ -184,4 +179,4 @@ velero_backup_schedule_name: default
 velero_backup_schedule_timings: "0 0 * * *"
 # Time-to-live for existing backups (defaults to 1 week)
 # See https://pkg.go.dev/time#ParseDuration for duration format options
-velero_backup_schedule_ttl: "168h"
+velero_backup_schedule_ttl: "168h"