Switch from sassc to cssbundling gem
What does this MR do and why?
We already chose to switch to cssbundling per default about a week ago: !144479 (merged)
We haven't seen any regressions in production (apart from the UTF-8 fix !145363 (merged) needed). So it is probably safe to move forward with the removal of the old SCSS compiler.
See also: #438278 (closed)
MR acceptance checklist
Please evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.
Screenshots or screen recordings
N/A
How to set up and validate locally
N/A - Everything should still work
Edited by Lukas 'ai-pi' Eipert