Revert "C++: nested class with enclosing template class"

This reverts commit 5d76b4339a since it
might lead to an infinite loop.

Task-number: QTCREATORBUG-11999
Change-Id: I12c7f3afc4aa53a83ddc2bf2d33eb76c29b747ee
Reviewed-by: Eike Ziller <eike.ziller@digia.com>
Reviewed-by: Orgad Shaneh <orgads@gmail.com>

src/plugins/cpptools/cppcompletion_test.cpp

@@ -304,6 +304,8 @@ void CppToolsPlugin::test_completion()
     expectedCompletions.sort();
 
     QEXPECT_FAIL("enum_in_function_in_struct_in_function", "doesn't work", Abort);
+    QEXPECT_FAIL("nested_class_in_template_class_QTCREATORBUG-11752",
+                 "related to infiniteLoopLocalTypedef_QTCREATORBUG-11999", Abort);
     QCOMPARE(actualCompletions, expectedCompletions);
 }