How to Hide Elastic Email Subscribe Form Admin Menus

function plt_hide_elastic_email_subscribe_form_menus() {
	//Hide "Elastic Email Subscribe".
	remove_menu_page('elasticemail-settings');
	//Hide "Elastic Email Subscribe → Settings".
	remove_submenu_page('elasticemail-settings', 'elasticemail-settings');
	//Hide "Elastic Email Subscribe → Send test".
	remove_submenu_page('elasticemail-settings', 'elasticemail-send-test');
	//Hide "Elastic Email Subscribe → Lists".
	remove_submenu_page('elasticemail-settings', 'elasticemail-lists');
	//Hide "Elastic Email Subscribe → Reports".
	remove_submenu_page('elasticemail-settings', 'elasticemail-report');
	//Hide "Elastic Email Subscribe → Security".
	remove_submenu_page('elasticemail-settings', 'elasticemail-security');
	//Hide "Elastic Email Subscribe → Error log".
	remove_submenu_page('elasticemail-settings', 'elasticemail-error-log');
}

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

Where do I put this code?