The "remove from code review queue" is not that hard really, you can just remove yourself (and reviewers you added) from reviewers. The most helpful reviewers also comment on why they've removed themselves. If reviewers removed themselves from patches they have no intention whatsoever to review (which is fine), things would be much easier.
Other effective ways to effectively remove an open patch from the review workflows (and from the korma stats, though not from [[Gerrit/Reports]]) is to self-give a -1 and/or slap a "[WIP]" in the first line.
Nemo