Remove unnecessary variables

Continuation of 54a281a425.
Related to #188 (Github Pull Request).

roles/matrix-bridge-mautrix-facebook/defaults/main.yml

@@ -7,10 +7,6 @@ matrix_mautrix_facebook_docker_image: "tulir/mautrix-facebook:latest"
 
 matrix_mautrix_facebook_base_path: "{{ matrix_base_data_path }}/mautrix-facebook"
 
-# Get your own API keys at https://developers.facebook.com/docs/apis-and-sdks/
-matrix_mautrix_facebook_api_id: ''
-matrix_mautrix_facebook_api_hash: ''
-
 matrix_mautrix_facebook_homeserver_address: 'https://{{ matrix_server_fqn_matrix }}'
 matrix_mautrix_facebook_homeserver_domain: '{{ matrix_domain }}'
 matrix_mautrix_facebook_appservice_address: 'http://matrix-mautrix-facebook:8080'