How to Hide DeBounce Email Validator Admin Menus

function plt_hide_debounce_io_email_validator_menus() {
	//Hide "DeBounce".
	remove_menu_page('debounce_email_validator');
	//Hide "DeBounce → Settings".
	remove_submenu_page('debounce_email_validator', 'debounce_email_validator');
	//Hide "DeBounce → Tools".
	remove_submenu_page('debounce_email_validator', 'debounce_email_validator&tab=tools');
	//Hide "DeBounce → Translate".
	remove_submenu_page('debounce_email_validator', 'debounce_email_validator&tab=translate');
	//Hide "DeBounce → Logs".
	remove_submenu_page('debounce_email_validator', 'debounce_email_validator&tab=logs');
	//Hide "DeBounce → About".
	remove_submenu_page('debounce_email_validator', 'debounce_email_validator&tab=about');
}

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

Where do I put this code?