How to Hide WP Import Export Lite Admin Menus

function plt_hide_wp_import_export_lite_menus() {
	//Hide "WP Imp Exp".
	remove_menu_page('wpie-new-export');
	//Hide "WP Imp Exp → New Export".
	remove_submenu_page('wpie-new-export', 'wpie-new-export');
	//Hide "WP Imp Exp → Manage Export".
	remove_submenu_page('wpie-new-export', 'wpie-manage-export');
	//Hide "WP Imp Exp → New Import".
	remove_submenu_page('wpie-new-export', 'wpie-new-import');
	//Hide "WP Imp Exp → Manage Import".
	remove_submenu_page('wpie-new-export', 'wpie-manage-import');
	//Hide "WP Imp Exp → Settings".
	remove_submenu_page('wpie-new-export', 'wpie-settings');
	//Hide "WP Imp Exp → Extensions".
	remove_submenu_page('wpie-new-export', 'wpie-extensions');
}

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

Where do I put this code?