[CLEANUP] Remove invalid :has CSS definition

There is a css rule containing a `:has()` rule.
This rule is not supported in any browser yet and
there must be also no whitespace between the `:has` and
the opening brace.

Resolves: #79890
Releases: master
Change-Id: Ief60c287f1bd0f95c6b61fde0e6f50704978357f
Reviewed-on: https://review.typo3.org/51739


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Josef Glatz <josef.glatz@typo3.org>
Reviewed-by: Tymoteusz Motylewski <t.motylewski@gmail.com>
Tested-by: Tymoteusz Motylewski <t.motylewski@gmail.com>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>