How to Hide Newsletter, SMTP, Email marketing and Subscribe forms by Brevo Admin Menus

function plt_hide_mailin_menus() {
	//Hide "Brevo".
	remove_menu_page('sib_page_home');
	//Hide "Brevo → Home".
	remove_submenu_page('sib_page_home', 'sib_page_home');
	//Hide "Brevo → Forms".
	remove_submenu_page('sib_page_home', 'sib_page_form');
	//Hide "Brevo → Statistics".
	remove_submenu_page('sib_page_home', 'sib_page_statistics');
}

add_action('admin_menu', 'plt_hide_mailin_menus', 10000);

Where do I put this code?