Removing "$Id$" lines

[Ryan Schmidt]

On Nov 1, 2016, at 12:38, Bradley Giesbrecht wrote:
> 
> Would it work as well to have the buildbots ignore commits with unchanged epoch_version_revision.

No: imagine that a port fails to build because pkgconfig wasn't there. To fix that, you'll add a build dependency on pkgconfig; you won't change the epoch, version or revision, but you still want the buildbot to try to build it again.