[mariadb] Drop some old workaround

innodb_lock_schedule_algorithm setting is removed in MariaDB 10.6.

Change-Id: I1ff06162569c46c51847b4c31933861549787c65
Depends-On: https://review.opendev.org/c/openstack/kolla/+/811014

ansible/roles/mariadb/templates/galera.cnf.j2

@@ -57,11 +57,6 @@ innodb_buffer_pool_size = '{{ dynamic_pool_size_mb }}M'
 innodb_buffer_pool_size = '8192M'
 {% endif %}
 
-# The default value for innodb_lock_schedule_algorithm is VATS, but this does
-# not work with galera. Set FCFS explicitly to avoid a warning.
-# https://mariadb.com/kb/en/library/innodb-system-variables/#innodb_lock_schedule_algorithm.
-innodb_lock_schedule_algorithm = FCFS
-
 [server]
 pid-file=/var/lib/mysql/mariadb.pid