Disable startup CSS
What does this MR do and why?
Remove remove_startup_css
feature flag and checks. Feature flag has been enabled on Gitlab for 2 months.
MR that deletes all startupCSS code: !124404 (merged)
Why are you doing this?
There is a small performance benefit to most users, and we get to remove 10k lines of code.
Some discussions and science in gitlab-org/frontend/rfcs#92 (comment 1187261050)
MR acceptance checklist
This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.
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I have evaluated the MR acceptance checklist for this MR.
Edited by Simon Knox