[TASK] Remove dummy require files from ext:adodb

Change-Id: Ia1d98cfbd904934c651946ad30ab6dcba367dc3f
Resolves: #47763
Related: #47756
Releases: 6.2
Reviewed-on: https://review.typo3.org/20367
Reviewed-by: Anja Leichsenring
Tested-by: Anja Leichsenring
Reviewed-by: Philipp Gampe
Tested-by: Philipp Gampe
Reviewed-by: Christian Kuhn
Tested-by: Christian Kuhn