How to Hide WP Database Backup - Unlimited Database & Files Backup by Backup for WP Admin Menus

function plt_hide_wp_database_backup_menus() {
	//Hide "Backups".
	remove_menu_page('wp-database-backup');
	//Hide "Backups → Backups".
	remove_submenu_page('wp-database-backup', 'wp-database-backup');
	//Hide "Backups → Auto Scheduler".
	remove_submenu_page('wp-database-backup', 'wp-database-backup#tab_db_schedul');
	//Hide "Backups → Save Backups to".
	remove_submenu_page('wp-database-backup', 'wp-database-backup#tab_db_destination');
	//Hide "Backups → Cloud Backup".
	remove_submenu_page('wp-database-backup', 'wp-database-backup#tab_db_remotebackups');
	//Hide "Backups → Migration".
	remove_submenu_page('wp-database-backup', 'wp-database-backup#tab_db_migrate');
	//Hide "Backups → Settings".
	remove_submenu_page('wp-database-backup', 'wp-database-backup#tab_db_setting');
	//Hide "Backups → Upgrade to Premium".
	remove_submenu_page('wp-database-backup', 'wp-database-backup#tab_db_upgrade');
	//Hide "Backups → Search and Replace".
	remove_submenu_page('wp-database-backup', 'wp-database-backup#searchreplace');
	//Hide "Backups → Help & Support".
	remove_submenu_page('wp-database-backup', 'wp-database-backup#tab_db_help');
}

add_action('admin_menu', 'plt_hide_wp_database_backup_menus', 11);
Where do I put this code?