[BUGFIX] Remove obsolete debugger.xlf file

The change in #98069 removed the Debug Console from the TYPO3 backend.
This patch removes the language file `debugger.xlf` that was forgotten
back then.

Resolves: #99787
Related: #98069
Releases: main
Change-Id: I64122596c29317955b803ba12078da85664173d9
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/77659


Reviewed-by: Nikita Hovratov <nikita.h@live.de>
Tested-by: core-ci <typo3@b13.com>
Reviewed-by: Oliver Bartsch <bo@cedev.de>
Tested-by: Nikita Hovratov <nikita.h@live.de>
Tested-by: Oliver Bartsch <bo@cedev.de>