remove row_number() function

row_number was converted to a UDF in datafusion v42 apache/datafusion#12030
This specific functionality needs to be added back in.

Author: emgeee

src/functions.rs

@@ -755,16 +755,6 @@ pub fn lag(
     add_builder_fns_to_window(window_fn, partition_by, order_by)
 }
 
-#[pyfunction]
-pub fn row_number(
-    partition_by: Option<Vec<PyExpr>>,
-    order_by: Option<Vec<PyExpr>>,
-) -> PyResult<PyExpr> {
-    let window_fn = window_function::row_number();
-
-    add_builder_fns_to_window(window_fn, partition_by, order_by)
-}
-
 #[pyfunction]
 pub fn rank(partition_by: Option<Vec<PyExpr>>, order_by: Option<Vec<PyExpr>>) -> PyResult<PyExpr> {
     let window_fn = window_function::rank();
@@ -1002,7 +992,6 @@ pub(crate) fn init_module(m: &Bound<'_, PyModule>) -> PyResult<()> {
     // Window Functions
     m.add_wrapped(wrap_pyfunction!(lead))?;
     m.add_wrapped(wrap_pyfunction!(lag))?;
-    m.add_wrapped(wrap_pyfunction!(row_number))?;
     m.add_wrapped(wrap_pyfunction!(rank))?;
     m.add_wrapped(wrap_pyfunction!(dense_rank))?;
     m.add_wrapped(wrap_pyfunction!(percent_rank))?;