CPP: Undo an accidentally committed change to the test.

Author: geoffw0

cpp/ql/test/library-tests/lambdas/captures/elements.ql

@@ -4,4 +4,4 @@ from Element e
 where not e instanceof BuiltInType
   and not e instanceof Specifier
   and not e instanceof Folder
-select e, concat(e.getAQlClass(), ", ")
+select e