Keep email runtime configuration out of Vault

infra/local/vault/notifications.hcl

@@ -31,10 +31,6 @@ env_template "EMAIL_API_KEY" {
   error_on_missing_key = true
 }
 
-env_template "EMAIL_CONFIG" {
-  contents = "{{ with secret \"kv/data/services/notifications/email/resend\" }}email:\n  driver: {{ .Data.data.driver | toJSON }}\n  settings:\n    api_key_env: EMAIL_API_KEY\n    sender_address: {{ .Data.data.sender_address | toJSON }}\n    sender_name: {{ .Data.data.sender_name | toJSON }}\n{{ end }}"
-  error_on_missing_key = true
-}
 
 exec {
   command = ["/usr/local/bin/start-service"]