[TASK] Remove reintroduced obsolete LocalConfiguration settings

With the introduction of Doctrine DBAL the obsolete settings of
all upgrade wizards related to TYPO3 CMS 7 are added again.

Remove them now again.

Resolves: #76258
Related: #75454
Releases: master
Change-Id: Ib86591525724b2fd189038a04dfa645815f4fe55
Reviewed-on: https://review.typo3.org/48238


Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>
Reviewed-by: Morton Jonuschat <m.jonuschat@mojocode.de>
Tested-by: Morton Jonuschat <m.jonuschat@mojocode.de>