refactor(app): 删除未使用的注销原因组件

test/account/account_pages_test.dart

@@ -71,23 +71,7 @@ void main() {
     );
 
     final l10n = await AppLocalizations.delegate.load(const Locale('en'));
-    final titleTop = tester
-        .getTopLeft(find.text(l10n.accountDeactivateReason))
-        .dy;
-    final fieldTop = tester
-        .getTopLeft(find.byKey(const Key('account-deactivate-reason')))
-        .dy;
-    expect(fieldTop, greaterThan(titleTop));
-    expect(find.text(l10n.accountDeactivateReasonUnused), findsOneWidget);
-    await tester.tap(find.byKey(const Key('account-deactivate-reason-0')));
-    await tester.pumpAndSettle();
-    expect(
-      tester
-          .widget<TextField>(find.byKey(const Key('account-deactivate-reason')))
-          .controller
-          ?.text,
-      l10n.accountDeactivateReasonUnused,
-    );
+    expect(find.text(l10n.accountDeactivateReason), findsOneWidget);
     await tester.enterText(
       find.byKey(const Key('account-deactivate-reason')),
       '不再使用',