remove uncovered tests after dropping python 3.7

Author: chelsea-lin

db_dtypes/pandas_backports.py

@@ -63,10 +63,7 @@ def import_default(module_name, force=False, default=None):
         return default
 
     name = default.__name__
-    try:
-        module = __import__(module_name, {}, {}, [name])
-    except ModuleNotFoundError:
-        return default
+    module = __import__(module_name, {}, {}, [name])
 
     return getattr(module, name, default)
 
@@ -80,26 +77,6 @@ class OpsMixin:
     def _cmp_method(self, other, op):  # pragma: NO COVER
         return NotImplemented
 
-    def __eq__(self, other):
-        return self._cmp_method(other, operator.eq)
-
-    def __ne__(self, other):
-        return self._cmp_method(other, operator.ne)
-
-    def __lt__(self, other):
-        return self._cmp_method(other, operator.lt)
-
-    def __le__(self, other):
-        return self._cmp_method(other, operator.le)
-
-    def __gt__(self, other):
-        return self._cmp_method(other, operator.gt)
-
-    def __ge__(self, other):
-        return self._cmp_method(other, operator.ge)
-
-    __add__ = __radd__ = __sub__ = lambda self, other: NotImplemented
-
 
 # TODO: use public API once pandas 1.5 / 2.x is released.
 # See: https://github.com/pandas-dev/pandas/pull/45544

tests/unit/test_date.py

@@ -48,9 +48,6 @@
     float("nan"),
 ]
 
-if hasattr(pandas, "NA"):
-    NULL_VALUE_TEST_CASES.append(pandas.NA)
-
 
 def test_box_func():
     input_array = db_dtypes.DateArray([])

tests/unit/test_dtypes.py

@@ -584,8 +584,7 @@ def test_date_add():
     do = pd.DateOffset(days=1)
     expect = dates.astype("object") + do
     np.testing.assert_array_equal(dates + do, expect)
-    if pandas_release >= (1, 1):
-        np.testing.assert_array_equal(do + dates, expect)
+    np.testing.assert_array_equal(do + dates, expect)
 
     with pytest.raises(TypeError):
         dates + times.astype("timedelta64")