Remove some TODOs

The answer to these is: it's good to have them in both places.
The role defines the obvious things it depends on (not knowing
what setup it will find itself into), and then
`group_vars/matrix_servers` "extends" it based on everything else it
knows (the homeserver being Synapse, whether or not the internal
Postgres server is being used, etc.)

group_vars/matrix_servers

@@ -265,7 +265,6 @@ matrix_mautrix_hangouts_database_password: "{{ matrix_synapse_macaroon_secret_ke
 # We don't enable bridges by default.
 matrix_mautrix_signal_enabled: false
 
-# TODO: unclear whether to put this into the role or keep it here
 matrix_mautrix_signal_systemd_required_services_list: |
   {{
     ['docker.service']
@@ -288,8 +287,7 @@ matrix_mautrix_signal_appservice_token: "{{ matrix_synapse_macaroon_secret_key |
 matrix_mautrix_signal_login_shared_secret: "{{ matrix_synapse_ext_password_provider_shared_secret_auth_shared_secret if matrix_synapse_ext_password_provider_shared_secret_auth_enabled else '' }}"
 
 matrix_mautrix_signal_database_engine: 'postgres'
-matrix_mautrix_signal_database_password: "{{ matrix_synapse_macaroon_secret_key | password_hash('sha512', 'mau.signal.db') | to_uuid }}" 
-
+matrix_mautrix_signal_database_password: "{{ matrix_synapse_macaroon_secret_key | password_hash('sha512', 'mau.signal.db') | to_uuid }}"
 
 ######################################################################
 #
@@ -1073,9 +1071,9 @@ matrix_postgres_additional_databases: |
     }] if (matrix_mautrix_hangouts_enabled and matrix_mautrix_hangouts_database_engine == 'postgres' and matrix_mautrix_hangouts_database_hostname == 'matrix-postgres') else [])
     +
     ([{
-      'name': matrix_mautrix_signal_database_name, 
-      'username': matrix_mautrix_signal_database_username, 
-      'password': matrix_mautrix_signal_database_password, 
+      'name': matrix_mautrix_signal_database_name,
+      'username': matrix_mautrix_signal_database_username,
+      'password': matrix_mautrix_signal_database_password,
     }] if (matrix_mautrix_signal_enabled and matrix_mautrix_signal_database_engine == 'postgres' and matrix_mautrix_signal_database_hostname == 'matrix-postgres') else [])
     +
     ([{

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

@@ -27,8 +27,7 @@ matrix_mautrix_signal_container_http_host_bind_port: ''
 matrix_mautrix_signal_container_extra_arguments: []
 
 # List of systemd services that matrix-mautrix-signal.service depends on.
-# TODO: unclear whether to put this into group_vars or keep it here
-matrix_mautrix_signal_systemd_required_services_list: 
+matrix_mautrix_signal_systemd_required_services_list:
   - 'docker.service'
   - 'matrix-mautrix-signal-daemon.service'
 
@@ -40,7 +39,7 @@ matrix_mautrix_signal_homeserver_token: ''
 
 # Database-related configuration fields
 #
-# This bridge only supports postgres. 
+# This bridge only supports postgres.
 #
 matrix_mautrix_signal_database_engine: 'postgres'
 
@@ -50,13 +49,13 @@ matrix_mautrix_signal_database_hostname: 'matrix-postgres'
 matrix_mautrix_signal_database_port: 5432
 matrix_mautrix_signal_database_name: 'matrix_mautrix_signal'
 
-matrix_mautrix_signal_database_connection_string: 'postgres://{{ matrix_mautrix_signal_database_username }}:{{ matrix_mautrix_signal_database_password }}@{{ matrix_mautrix_signal_database_hostname }}:{{ matrix_mautrix_signal_database_port }}/{{ matrix_mautrix_signal_database_name }}' 
+matrix_mautrix_signal_database_connection_string: 'postgres://{{ matrix_mautrix_signal_database_username }}:{{ matrix_mautrix_signal_database_password }}@{{ matrix_mautrix_signal_database_hostname }}:{{ matrix_mautrix_signal_database_port }}/{{ matrix_mautrix_signal_database_name }}'
 
-matrix_mautrix_signal_appservice_database: "{{ 
- 	{ 
- 		'postgres': matrix_mautrix_facebook_database_connection_string, 
- 	}[matrix_mautrix_signal_database_engine] 
- }}" 
+matrix_mautrix_signal_appservice_database: "{{
+ 	{
+ 		'postgres': matrix_mautrix_facebook_database_connection_string,
+ 	}[matrix_mautrix_signal_database_engine]
+ }}"
 
 # Can be set to enable automatic double-puppeting via Shared Secret Auth (https://github.com/devture/matrix-synapse-shared-secret-auth).
 matrix_mautrix_signal_login_shared_secret: ''
@@ -96,4 +95,4 @@ matrix_mautrix_signal_registration_yaml: "{{ lookup('template', 'templates/regis
 
 matrix_mautrix_signal_registration: "{{ matrix_mautrix_signal_registration_yaml|from_yaml }}"
 
-matrix_mautrix_signal_log_level: 'DEBUG'
+matrix_mautrix_signal_log_level: 'DEBUG'