Remove theme from updates list

hooks.php

add_filter( 'site_transient_update_themes', 'probit_disable_update_notice' );
function probit_disable_update_notice( $updates_transient ) {

	$updates       = $updates_transient->response;
	$current_theme = get_option( 'template' );

	if ( isset( $updates[ $current_theme ] ) ) {
		unset( $updates[ $current_theme ] );
	}

	$updates_transient->response = $updates;

	return $updates_transient;
}