remove defunct test bits

Author: jbrockmendel

Diff for: pandas/tests/tseries/offsets/test_month.py

@@ -23,7 +23,6 @@
     DatetimeIndex,
     Series,
     _testing as tm,
-    date_range,
 )
 from pandas.tests.tseries.offsets.common import (
     assert_is_on_offset,
@@ -74,11 +73,6 @@ def test_offset_whole_year(self):
         exp = DatetimeIndex(dates[1:])
         tm.assert_index_equal(result, exp)
 
-        # ensure generating a range with DatetimeIndex gives same result
-        result = date_range(start=dates[0], end=dates[-1], freq="SM")
-        exp = DatetimeIndex(dates, freq="SM")
-        tm.assert_index_equal(result, exp)
-
     offset_cases = []
     offset_cases.append(
         (
@@ -330,11 +324,6 @@ def test_offset_whole_year(self):
         exp = DatetimeIndex(dates[1:])
         tm.assert_index_equal(result, exp)
 
-        # ensure generating a range with DatetimeIndex gives same result
-        result = date_range(start=dates[0], end=dates[-1], freq="SMS")
-        exp = DatetimeIndex(dates, freq="SMS")
-        tm.assert_index_equal(result, exp)
-
     offset_cases = [
         (
             SemiMonthBegin(),