[!!!][TASK] Remove deprecated chart.js code from ext:hashboard

Resolves: #101060
Related: #100963
Related: #99150
Releases: main
Change-Id: Ie0672b9eefeb52ef1266630dc45eff3f8c53617e
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/79375


Tested-by: core-ci <typo3@b13.com>
Tested-by: Stefan Bürk <stefan@buerk.tech>
Reviewed-by: Stefan Bürk <stefan@buerk.tech>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>