remove Arc from create_udf call

Ref: apache/datafusion#12489

Author: Michael-J-Ward

src/udf.rs

@@ -97,7 +97,7 @@ impl PyScalarUDF {
         let function = create_udf(
             name,
             input_types.0,
-            Arc::new(return_type.0),
+            return_type.0,
             parse_volatility(volatility)?,
             to_scalar_function_impl(func),
         );