Remove TODO comment related to interpolator setting

Default interpolators for UxDataset fields are being set in
Field.__init__ with a call to field._select_ux_interpolator

Author: fluidnumerics-joe

src/parcels/_core/fieldset.py

@@ -283,7 +283,6 @@ def from_fesom2(ds: ux.UxDataset):
 
         fields = {}
         if "U" in ds.data_vars and "V" in ds.data_vars:
-            # TO DO: Assign interpolator based on dimensions
             fields["U"] = Field("U", ds["U"], grid)
             fields["V"] = Field("V", ds["V"], grid)
             fields["U"].units = GeographicPolar()