Drop feature "don't replicate mysql database"

defaults/main.yml

@@ -97,8 +97,6 @@ mariadb_slave_import_data: true
 mariadb_slave_import_from: "{{ mariadb_replication_host }}"
 # Delete dump after slave configuration (set false if you have many slaves to install, it avoids to create many dumps)
 mariadb_slave_import_flush_dump: true
-# Slave uses mysql database from master?
-mariadb_slave_replicate_mysqldb: true
 # Don't replicate these DBs/tables
 mariadb_slave_ignore_db: []
 mariadb_slave_ignore_table: []

tasks/replication/slave/import_data.yml

@@ -36,12 +36,6 @@
     register: prep
     changed_when: "'This target seems to be not prepared yet' in prep.stderr"
 
-  - name: FILE | Remove mysql db from backup
-    file:
-      path: "{{ mariadb_backup_dir }}/mysql"
-      state: absent
-    when: backup.changed and not mariadb_slave_replicate_mysqldb
-
   delegate_to: "{{ mariadb_slave_import_from }}"
 
 - name: MYSQL_VARIABLES | Get datadir

templates/etc/mysql/mariadb.conf.d/40-slave.cnf.j2

@@ -12,9 +12,6 @@ read-only
 {% endif %}
 
 # --> Ignore DB/tables
-{% if not mariadb_slave_replicate_mysqldb %}
-replicate-ignore-db=mysql
-{% endif %}
 {% for db in mariadb_slave_ignore_db %}
 replicate-ignore-db={{ db }}
 {% endfor %}