remove defaults from pandas

Author: raisadz

narwhals/_pandas_like/dataframe.py

@@ -660,11 +660,11 @@ def join_asof(
         self: Self,
         other: Self,
         *,
-        left_on: str | None = None,
-        right_on: str | None = None,
-        by_left: list[str] | None = None,
-        by_right: list[str] | None = None,
-        strategy: Literal["backward", "forward", "nearest"] = "backward",
+        left_on: str | None,
+        right_on: str | None,
+        by_left: list[str] | None,
+        by_right: list[str] | None,
+        strategy: Literal["backward", "forward", "nearest"],
         suffix: str,
     ) -> Self:
         plx = self.__native_namespace__()