How to Hide ez Form Calculator Admin Menus

function plt_hide_ez_form_calculator_menus() {
	//Hide "ez Form Calculator".
	remove_menu_page('ezfc');
	//Hide "ez Form Calculator → ez Form Calculator".
	remove_submenu_page('ezfc', 'ezfc');
	//Hide "ez Form Calculator → Form settings".
	remove_submenu_page('ezfc', 'ezfc-settings-form');
	//Hide "ez Form Calculator → Global settings".
	remove_submenu_page('ezfc', 'ezfc-options');
	//Hide "ez Form Calculator → Form submissions".
	remove_submenu_page('ezfc', 'ezfc-submissions');
	//Hide "ez Form Calculator → Import / Export".
	remove_submenu_page('ezfc', 'ezfc-importexport');
	//Hide "ez Form Calculator → Stats".
	remove_submenu_page('ezfc', 'ezfc-stats');
	//Hide "ez Form Calculator → Help / debug".
	remove_submenu_page('ezfc', 'ezfc-help');
	//Hide "ez Form Calculator → Preview".
	remove_submenu_page('ezfc', 'ezfc-preview');
	//Hide "ez Form Calculator → Premium version".
	remove_submenu_page('ezfc', 'ezfc-premium');
}

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