Prevent a Wordpress Plugin from checking for updates

preventwordpresspluginupdates.php

// Just add the following snippet in your plugin main file
// Code updated for Wordpress 3.8.1


add_filter( 'http_request_args', 'acs_prevent_update_check',10, 2 );
function acs_prevent_update_check( $r, $url ) {
    if ( 0 === strpos( $url, 'https://api.wordpress.org/plugins/update-check/1.1/' ) ) {        
        $my_plugin = plugin_basename(__FILE__);
        $plugins = json_decode($r['body']['plugins'], true);        
        if (array_key_exists($my_plugin, $plugins['plugins'])){
            unset($plugins['plugins'][$my_plugin]);
        }        
        $r['body']['plugins'] = json_encode( $plugins );            
    }
    return $r;
}