Remove TODO

Author: aterribili

test/nuvigator_test.dart

@@ -628,7 +628,6 @@ void main() {
         ['nestedScreen1', 'nestedScreen4'],
       );
 
-      // TODO: Fix, actually returning just ['secondNestedScreen1'] on master
       expect(
         tracker.secondNestedStack.map((e) => e!.settings.name),
         ['secondNestedScreen1', 'secondNestedScreen2'],