remove deprecated

Author: MarcoGorelli

tests/expr_and_series/lit_test.py

@@ -134,11 +134,7 @@ def test_date_lit(constructor: Constructor, request: pytest.FixtureRequest) -> N
 
 def test_pyarrow_lit_string() -> None:
     df = nw.from_native(pa.table({"a": [1, 2, 3]}))
-    result = df.select(nw.lit("foo")).to_native().schema.field_by_name("literal")
+    result = df.select(nw.lit("foo")).to_native().schema.field("literal")
     assert pa.types.is_large_string(result.type)
-    result = (
-        df.select(nw.lit("foo", dtype=nw.String))
-        .to_native()
-        .schema.field_by_name("literal")
-    )
+    result = df.select(nw.lit("foo", dtype=nw.String)).to_native().schema.field("literal")
     assert pa.types.is_large_string(result.type)