Delete root password management

On Buster, it uses socket auth.

tasks/install/mariadb/default.yml

@@ -1,29 +1,5 @@
 ---
 
-- name: SHELL | Get MariaDB target version
-  shell: "LANG=C apt-cache depends mariadb-server | awk -F '-' '/Depends/ { print $NF }'"
-  register: apt_mariadb_version
-  changed_when: false
-
-- block:
-
-  - name: DEBCONF | Prepare MariaDB silent installation (root password)
-    debconf:
-      name: 'mariadb-server-{{ apt_mariadb_version.stdout }}'
-      question: 'mysql-server/root_password'
-      vtype: 'password'
-      value: '{{ mariadb_root_password }}'
-    when: not mariadb_exists.stat.exists
-  
-  - name: DEBCONF | Prepare MariaDB silent installation (root password again)
-    debconf:
-      name: 'mariadb-server-{{ apt_mariadb_version.stdout }}'
-      question: 'mysql-server/root_password_again'
-      vtype: 'password'
-      value: '{{ mariadb_root_password }}'
-
-  when: not mariadb_exists.stat.exists and mariadb_root_password is string
-
 - name: APT | Install MariaDB server
   apt:
     pkg: mariadb-server