[TASK] Remove dummy files from ext:rsaauth

Change-Id: I2b063ebeb88f1d059900c1eb75f8c22308753fb3
Resolves: #47795
Related: #47756
Releases: 6.2
Reviewed-on: https://review.typo3.org/20386
Reviewed-by: Anja Leichsenring
Tested-by: Anja Leichsenring
Reviewed-by: Wouter Wolters
Tested-by: Wouter Wolters
Reviewed-by: Christian Kuhn
Tested-by: Christian Kuhn