How to Hide WPMasterToolKit Admin Menus

function plt_hide_wpmastertoolkit_menus() {
	//Hide the "WPMasterToolkit" menu.
	remove_menu_page('wp-mastertoolkit-settings');
	//Hide the "WPMasterToolkit → WPMasterToolkit" menu.
	remove_submenu_page('wp-mastertoolkit-settings', 'wp-mastertoolkit-settings');
	//Hide the "WPMasterToolkit → Manage License" menu.
	remove_submenu_page('wp-mastertoolkit-settings', 'wpmastertoolkit-manage-license');
}

add_action('admin_menu', 'plt_hide_wpmastertoolkit_menus', 10000000);

Where do I put this code?