remove obsolete unit tests

tests/test_core.py

@@ -32,10 +32,8 @@
 from contextlib import nullcontext as does_not_raise
 
 import netCDF4 as nc
-import pytest
 
 from ncompare.core import (
-    _get_vars,
     _var_properties,
     compare,
 )
@@ -73,16 +71,6 @@ def test_no_error_compare_2groupsTo1Subgroup(
     compare_ba(ds_3dims_3vars_4coords_2groups, ds_3dims_3vars_4coords_1subgroup)
 
 
-def test_get_vars_with_group(ds_3dims_3vars_4coords_1group):
-    result = _get_vars(ds_3dims_3vars_4coords_1group, groupname="Group1")
-    assert set(result) == {"step", "var1", "var2", "w"}
-
-
-def test_get_vars_error_when_no_group(ds_3dims_2vars_4coords):
-    with pytest.raises(OSError):
-        _get_vars(ds_3dims_2vars_4coords, groupname="nonexistent_group")
-
-
 def test_var_properties(ds_3dims_3vars_4coords_1group):
     with nc.Dataset(ds_3dims_3vars_4coords_1group) as ds:
         result = _var_properties(ds.groups["Group1"], varname="step")