[BUGFIX] Remove unused argument $entryPointLevel from Bootstrap

The argument is optional and can be removed without
further notice.

Resolves: #87212
Related: #87202
Releases: master
Change-Id: I667a091b84986111562a581c0bb22d29f624fd19
Reviewed-on: https://review.typo3.org/59211


Reviewed-by: Benjamin Franzke <bfr@qbus.de>
Tested-by: Benjamin Franzke <bfr@qbus.de>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: Wouter Wolters <typo3@wouterwolters.nl>