wp-disable-plugin-update.php

<?php
/**
 * Prevent update notification for plugin - 
 * http://www.thecreativedev.com/disable-updates-for-specific-plugin-in-wordpress/
 * Add to the core plugin file 
 */
function disable_plugin_updates( $value ) {
  if ( isset($value) && is_object($value) ) {
		$plugin_file_name = basename(__DIR__) . '/' . basename(__FILE__);
    if ( isset( $value->response[$plugin_file_name] ) ) {
      unset( $value->response[$plugin_file_name] );
    }
  }
  return $value;
}
add_filter( 'site_transient_update_plugins', 'disable_plugin_updates' );