Remove priority icon from issue rows across the app

Priority is still supported as a feature (editable in issue properties,
used in filters), but no longer shown prominently in every issue row.
Affects inbox, issues list, my issues, and dashboard pages.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

ui/src/components/IssuesList.tsx

@@ -680,9 +680,6 @@ export function IssuesList({
                   )}
                   desktopMetaLeading={(
                     <>
-                      <span className="hidden sm:inline-flex">
-                        <PriorityIcon priority={issue.priority} />
-                      </span>
                       <span
                         className="hidden shrink-0 sm:inline-flex"
                         onClick={(e) => {