Revert "gpui: Improve path rendering & global multisample anti-aliasing" (#34722)

Reverts zed-industries/zed#29718

We've noticed some issues with Zed on Intel-based Macs where typing has
become sluggish, and git bisect has seemed to point towards this PR.
Reverting for now, until we can understand why it is causing this issue.
9a20843ba2Joseph T. Lyons committed on 7/18/2025, 4:03:08 PM· committed by GitHubparente421fc7
16 files changedLine totals unavailable