[TASK] Remove browser-native Notification API

TYPO3 has native Browser Notification API since a few TYPO3 versions.

However, also due to recent security implementations (permission API)
in browsers, and TYPO3 not strongly using this feature (only for LoginRefresh
when a login is about to expire, and ONLY when this window is not focussed),
this feature is dropped in favor of UX.

Resolves: #92988
Releases: master
Change-Id: I8e92d96bb47bf060f35b06375d8ff49ff131c185
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/66997


Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>