bpo-42519: Replace PyObject_MALLOC() with PyObject_Malloc() (GH-23587)

No longer use deprecated aliases to functions:

* Replace PyObject_MALLOC() with PyObject_Malloc()
* Replace PyObject_REALLOC() with PyObject_Realloc()
* Replace PyObject_FREE() with PyObject_Free()
* Replace PyObject_Del() with PyObject_Free()
* Replace PyObject_DEL() with PyObject_Free()
diff --git a/Modules/_sha3/sha3module.c b/Modules/_sha3/sha3module.c
index da6dde6..cae10f9 100644
--- a/Modules/_sha3/sha3module.c
+++ b/Modules/_sha3/sha3module.c
@@ -274,7 +274,7 @@ SHA3_dealloc(SHA3object *self)
     }
 
     PyTypeObject *tp = Py_TYPE(self);
-    PyObject_Del(self);
+    PyObject_Free(self);
     Py_DECREF(tp);
 }