How to Hide Email Marketing Automation - Mail Mint Admin Menus

function plt_hide_mail_mint_menus() {
	//Hide "Tools → Scheduled Actions".
	remove_submenu_page('tools.php', 'action-scheduler');

	//Hide "Mail Mint".
	remove_menu_page('mrm-admin');
	//Hide "Mail Mint → Dashboard".
	remove_submenu_page('mrm-admin', 'mrm-admin');
	//Hide "Mail Mint → Contacts".
	remove_submenu_page('mrm-admin', 'mrm-admin#/contacts');
	//Hide "Mail Mint → Campaigns".
	remove_submenu_page('mrm-admin', 'mrm-admin#/campaigns');
	//Hide "Mail Mint → Automations".
	remove_submenu_page('mrm-admin', 'mrm-admin#/automations');
	//Hide "Mail Mint → Forms".
	remove_submenu_page('mrm-admin', 'mrm-admin#/forms');
	//Hide "Mail Mint → Email Templates".
	remove_submenu_page('mrm-admin', 'mrm-admin#/email-templates');
	//Hide "Mail Mint → Tools".
	remove_submenu_page('mrm-admin', 'mrm-admin#/tools/link-triggers');
	//Hide "Mail Mint → Integrations".
	remove_submenu_page('mrm-admin', 'mrm-admin#/integrations');
	//Hide "Mail Mint → Settings".
	remove_submenu_page('mrm-admin', 'mrm-admin#/settings/business-info');
}

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