How to Hide Easy HTTPS (SSL) Redirection Admin Menus

function plt_hide_https_redirection_menus() {
	//Hide "Settings → HTTPS Redirection".
	remove_submenu_page('options-general.php', 'https-redirection');

	//Hide "Easy HTTPS & SSL".
	remove_menu_page('ehssl');
	//Hide "Easy HTTPS & SSL → Dashboard".
	remove_submenu_page('ehssl', 'ehssl');
	//Hide "Easy HTTPS & SSL → Settings".
	remove_submenu_page('ehssl', 'ehssl_settings');
	//Hide "Easy HTTPS & SSL → Certificate Expiry".
	remove_submenu_page('ehssl', 'ehssl_certificate_expiry');
}

add_action('admin_menu', 'plt_hide_https_redirection_menus', 11);

Where do I put this code?