Loding webspellchecker

Is it posible to supress?
Key    Value
Request    GET /sproxy_fck/sproxy.php?plugin=fck2&customerid=1:ua3xw1-2XyGJ3-GWruD3-6OFNT1-oXcuB1-nR6Bp4-hgQHc-EcYng3-sdRXG3-NOfFk&cmd=script&doc=wsc&schema=22 HTTP/1.1
Accept    application/javascript, */*;q=0.8
Referer    http://localhost:47738/Redaktion/editor
Accept-Language    de-AT
User-Agent    Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0)
Accept-Encoding    gzip, deflate
Host    loader.webspellchecker.net
Connection    Keep-Alive

If the plugin is removed from editor there ist still a call to this external js which take for a 400ms.