Remove unused variables.

Modules/arraymodule.c

@@ -1566,7 +1566,7 @@ PyMethodDef array_methods[] = {
 static PyObject *
 array_repr(arrayobject *a)
 {
-	char buf[256], typecode;
+	char typecode;
 	PyObject *s, *v = NULL;
 	Py_ssize_t len;
 

Modules/datetimemodule.c

@@ -4006,7 +4006,6 @@ datetime_subtract(PyObject *left, PyObject *right)
 static PyObject *
 datetime_repr(PyDateTime_DateTime *self)
 {
-	char buffer[1000];
 	const char *type_name = self->ob_type->tp_name;
 	PyObject *baserepr;