Remove std::move to resolve clang-tidy error:

```
/__w/pybind11/pybind11/include/pybind11/functional.h:47:67: error: passing result of std::move() as a const reference argument; no move will actually happen [performance-move-const-arg,-warnings-as-errors]
   47 |     explicit func_wrapper_base(func_handle &&hf) noexcept : hfunc(std::move(hf)) {}
      |                                                                   ^~~~~~~~~~  ~
/__w/pybind11/pybind11/include/pybind11/functional.h:23:8: note: 'func_handle' is not move assignable/constructible
```

include/pybind11/functional.h

@@ -44,7 +44,7 @@ struct func_handle {
 // to emulate 'move initialization capture' in C++11
 struct func_wrapper_base {
     func_handle hfunc;
-    explicit func_wrapper_base(func_handle &&hf) noexcept : hfunc(std::move(hf)) {}
+    explicit func_wrapper_base(func_handle &&hf) noexcept : hfunc(hf) {}
 };
 
 template <typename Return, typename... Args>