#ifdef out entire wrap() function to avoid unused-parameter warning-as-error under macos-13

```
/Users/runner/work/pybind11/pybind11/tests/test_class_sh_trampoline_basic.cpp:67:23: error: unused parameter 'm' [-Werror,-Wunused-parameter]
void wrap(py::module_ m, const char *py_class_name) {
                      ^
/Users/runner/work/pybind11/pybind11/tests/test_class_sh_trampoline_basic.cpp:67:38: error: unused parameter 'py_class_name' [-Werror,-Wunused-parameter]
void wrap(py::module_ m, const char *py_class_name) {
                                     ^
2 errors generated.
```

Author: rwgk

tests/test_class_sh_trampoline_basic.cpp

@@ -63,9 +63,9 @@ int AddInCppUniquePtr(std::unique_ptr<Abase<SerNo>> obj, int other_val) {
     return obj->Add(other_val) * 100 + 13;
 }
 
+#ifdef PYBIND11_SMART_HOLDER_ENABLED
 template <int SerNo>
 void wrap(py::module_ m, const char *py_class_name) {
-#ifdef PYBIND11_SMART_HOLDER_ENABLED
     py::classh<Abase<SerNo>, AbaseAlias<SerNo>>(m, py_class_name)
         .def(py::init<int>(), py::arg("val"))
         .def("Get", &Abase<SerNo>::Get)
@@ -74,8 +74,8 @@ void wrap(py::module_ m, const char *py_class_name) {
     m.def("AddInCppRawPtr", AddInCppRawPtr<SerNo>, py::arg("obj"), py::arg("other_val"));
     m.def("AddInCppSharedPtr", AddInCppSharedPtr<SerNo>, py::arg("obj"), py::arg("other_val"));
     m.def("AddInCppUniquePtr", AddInCppUniquePtr<SerNo>, py::arg("obj"), py::arg("other_val"));
-#endif
 }
+#endif
 
 } // namespace class_sh_trampoline_basic
 } // namespace pybind11_tests