fix(a11y): Fix unreadable description when tabbing through Revision Popover
Created by: plibither8
This PR removes extra CSS rules for :focus on the revision popover's item's link, to prevent the text becoming unreadable when having tab-focus.
Closes #37094 (closed)
Test plan
Tabbing through the revision popover's items now has readable text throughout.
App preview:
Check out the client app preview documentation to learn more.