ref(ui): Remove orphaned files and unused exports

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Agent transcript: https://claudescope.sentry.dev/share/pxAVht4UjkdydDJ04XfTa8Ow3ZZ8hQtyPe4WbpfpBWs

Author: chromy

static/app/components/archivedBox.spec.tsx

@@ -1,6 +1,5 @@
 import {DateTime} from 'sentry/components/dateTime';
 import {Duration} from 'sentry/components/duration';
-import {BannerContainer, BannerSummary} from 'sentry/components/events/styles';
 import {t} from 'sentry/locale';
 import type {Group, IgnoredStatusDetails} from 'sentry/types/group';
 import {GroupSubstatus} from 'sentry/types/group';
@@ -58,13 +57,3 @@ export function renderArchiveReason({substatus, statusDetails}: ArchivedBoxProps
 
   return t('This issue has been archived forever.');
 }
-
-export function ArchivedBox({substatus, statusDetails}: ArchivedBoxProps) {
-  return (
-    <BannerContainer priority="default">
-      <BannerSummary>
-        <span>{renderArchiveReason({substatus, statusDetails})}</span>
-      </BannerSummary>
-    </BannerContainer>
-  );
-}