A Google Webmaster Help thread asks a question I honestly never thought of before. Why isn't there a way to cancel a reconsideration request in Google Webmaster Tools?
The webmaster said he submitted a reconsideration request but did it for the wrong reason. He said, "I'd like to cancel that reconsideration. Searching the forums I found "Don't worry about it". That's not quite what i wanted to hear about this."
Why would you want to cancel such a request?
(1) The issue is no longer an issue.
(2) You rather not waste Google's time reviewing your site.
(3) In hindsight, you prefer Google not manually review your site.
(4) Some suspect a reconsideration requests starts you back at zero.
Unfortunately, there is no way to cancel a reconsideration request at this time.
Forum discussion at Google Webmaster Help.