From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Alex Riesen" <raa.lkml@gmail.com>
Subject: Re: Really remove a file ?
Date: Thu, 9 Oct 2008 20:56:35 +0200
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To: marcreddist@aim.com
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2008/10/9  <marcreddist@aim.com>:
> So is there a way to really remove a file in the git repository so that it
> never existed (I mean not having the diff in the logs and the data stored
> somewhere in the .git directory) ? Or if it's not the was git is supposed to
> be used, is there a way to hide the diff (even from git-log) or something ?

Yes. But you'll change the whole history (of course, it should _never_
mention the file).
See git filter-branch (there is even an example at the end of its man page.
Replace mv with rm)