remove more overlefts from webhooks copy

roles/custom/matrix-bridge-appservice-polychat/tasks/validate_config.yml

@@ -10,7 +10,6 @@
     - matrix_appservice_polychat_homeserver_url
     - matrix_appservice_polychat_homeserver_token
     - matrix_appservice_polychat_id_token
-    - matrix_appservice_polychat_api_secret
     - matrix_appservice_polychat_container_network
     - matrix_appservice_polychat_hostname
     - matrix_appservice_polychat_path_prefix

roles/custom/matrix-bridge-appservice-polychat/templates/config.yaml.j2

@@ -12,12 +12,6 @@ homeserver:
 webhookBot:
   # The localpart to use for the bot. May require re-registering the application service.
   localpart: "_webhook"
-
-# Provisioning API options
-provisioning:
-  # Your secret for the API. Required for all provisioning API requests.
-  secret: '{{ matrix_appservice_polychat_api_secret }}'
-
 # Configuration related to the web portion of the bridge. Handles the inbound polychat
 web:
   hookUrlBase:  "{{ matrix_appservice_polychat_inbound_uri_prefix }}"