Revert "Added test collection migration"

This reverts commit 03db8d38263ba8cf6d8b19a420ff307094194d01.
Revert "added plone.app.collection for migration from atct"

This reverts commit fb83172c000f28e3db4efc7ab43d53839a279c94.
Revert "Added migration Collection from app.collection to app.contenttypes"

This reverts commit 0cb96c4ca3cbe24374928cdf9a3c968539d94d74.