Removed uneeded placeholder db password

docs/configuring-playbook-matrix-media-repo.md

@@ -18,7 +18,6 @@ Add the following configuration to your `inventory/host_vars/matrix.DOMAIN/vars.
 
 ```yaml
 matrix_media_repo_enabled: true
-matrix_media_repo_database_password: "your_password"
 
 # (optional) Turned off by default
 # matrix_media_repo_metrics_enabled: true

roles/custom/matrix-media-repo/defaults/main.yml

@@ -124,7 +124,7 @@ matrix_media_repo_federation_ignored_hosts: []
 # Do NOT put your homeserver's existing database credentials here. Create a new database and
 # user instead. Using the same server is fine, just not the same username and database.
 matrix_media_repo_database_username: "matrix_media_repo"
-matrix_media_repo_database_password: "your_password"
+matrix_media_repo_database_password: ""
 matrix_media_repo_database_hostname: "{{ devture_postgres_identifier }}"
 matrix_media_repo_database_port: 5432
 matrix_media_repo_database_name: "matrix_media_repo"