Remove PloneHotfix20121106. It's included in Plone >= 4.2.3.

It also will cause newer instances to fail. See
http://plone.293351.n2.nabble.com/Buildout-Update-to-4-2-3-and-NameError-name-marker-is-not-defined-td7562517.html
Merge pull request #3 from 4teamwork/lg-remove-plonehotfix20121106

Remove PloneHotfix20121106. It's included in Plone >= 4.2.3.