chore: remove unused helm value (#223)

## Issue
N/A

## Description
Remove unused Helm value.

Signed-off-by: Tyler Gillson <tyler.gillson@gmail.com>

chart/validator-plugin-azure/README.md

@@ -37,7 +37,6 @@ The following table lists the configurable parameters of the Validator-plugin-az
 | `kubernetesClusterDomain` |  | `"cluster.local"` |
 | `metricsService.ports` |  | `[{"name": "https", "port": 8443, "protocol": "TCP", "targetPort": "https"}]` |
 | `metricsService.type` |  | `"ClusterIP"` |
-| `auth.secret` |  | `{}` |
 | `auth.serviceAccountName` |  | `""` |
 
 

chart/validator-plugin-azure/values.yaml

@@ -59,12 +59,6 @@ metricsService:
     targetPort: https
   type: ClusterIP
 auth:
-  # Leave secret undefined for implicit auth (e.g., WorkloadIdentity credentials)
-  secret: {}
-    # Specify the name of a secret in your cluster that contains Azure credentials.
-    # E.g.: https://github.com/validator-labs/validator/blob/main/chart/validator/templates/plugin-secret-azure.yaml
-    # secretName: azure-creds
-
   # Override the service account used by Azure validator (optional, could be used for WorkloadIdentityCredentials on AKS)
   # WARNING: the chosen service account must include all RBAC privileges found in templates/manager-rbac.yaml
   serviceAccountName: ""