[CLEANUP] Moved Breaking Documentation

The Documentation snippets have been reviewed and moved into the 7.0
folder.

Resolves: #63427
Releases: master
Change-Id: I0755b809c46e48d9e10cefb9e22343a3b1e7d341
Reviewed-on: http://review.typo3.org/34773
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>