fixup! Support Vagrant: quick & easy Linux virtual machine setup

It is a pain to maintain the .gitignore changes required to support
Vagrant. And we have had no indication whatsoever, at least since 2015,
that anybody was using it.

So let's drop it.

Signed-off-by: Johannes Schindelin <[email protected]>

Author: dscho

.gitignore

@@ -272,6 +272,3 @@ Release/
 /UpgradeLog*.htm
 /git.VC.VC.opendb
 /git.VC.db
-/.vagrant/
-/vagrant2[0-9][0-9][0-9]*-*-*
-/d2[0-9][0-9][0-9]*-*-*