Remove unused indices in `mac/text_system` (#40420)

just simplifying the code a bit

Release Notes:

- N/A

Co-authored-by: Cole Miller <cole@zed.dev>
c288f9b1e6Andrew Farkas committed on 10/16/2025, 8:28:36 PM· committed by GitHubparentb26491f
1 file changedLine totals unavailable