remove the stale ValueError

Author: tasansal

src/mdio/segy/utilities.py

@@ -47,9 +47,6 @@ def get_grid_plan(  # noqa:  C901
 
     Returns:
         All index dimensions or dimensions together with header values.
-
-    Raises:
-        ValueError: If appropriate grid override parameters are not provided.
     """
     if grid_overrides is None:
         grid_overrides = {}