[TASK] Remove dependencies in composer.json

This is done due to the fact that templavoila
will never be the root package in any case and
therefore will never install typo3 as a package
into vendor/.

Also scrutinizr cannot resolve the dependency and
therefore fails executing code quality checks.

Releases: 2.0.0
Change-Id: Ic82c6f77a77d17e31ba6f0edc68355eb64068069
Reviewed-on: https://review.typo3.org/31388
Reviewed-by: Wouter Wolters
Tested-by: Wouter Wolters