google play store - How do I remove a review I've written from the Android Market app?

How do I delete a review that I have written from the Android Market?

Somewhere in Google's issue tracking software someone has raised this issue (I've lost the link, sorry), and the answer given was that there is a "remove review" menu option when viewing the app in question in the Market application. The person asking seemed satisfied, however there is no such menu option on my phone (Android 2.2).