Drop remaining skip check for Python < 3

... because Python 2.x is no longer supported.

Change-Id: I3167a539b3e26ceb35976fbd7a2356ba59d4a5e4

test/unit/common/ring/test_builder.py

@@ -2492,9 +2492,6 @@ class TestRingBuilder(unittest.TestCase):
             (0, 0, '127.0.0.1', 3): [0, 256, 0, 0],
         })
 
-    @unittest.skipIf(sys.version_info < (3,),
-                     "Seed-specific tests don't work well between python "
-                     "versions. This test is now PY3 only")
     def test_undispersable_zone_converge_on_balance(self):
         rb = ring.RingBuilder(8, 6, 0)
         dev_id = 0
@@ -2550,9 +2547,6 @@ class TestRingBuilder(unittest.TestCase):
         self.assertEqual(rb.get_balance(), 14.453125)
         self.assertEqual(rb.dispersion, 16.6015625)
 
-    @unittest.skipIf(sys.version_info < (3,),
-                     "Seed-specific tests don't work well between python "
-                     "versions. This test is now PY3 only")
     def test_undispersable_server_converge_on_balance(self):
         rb = ring.RingBuilder(8, 6, 0)
         dev_id = 0

test/unit/common/ring/test_ring.py

@@ -531,9 +531,6 @@ class TestRing(TestRingBase):
         self.ring.devs.append(new_dev)
         self.ring._rebuild_tier_data()
 
-    @unittest.skipIf(sys.version_info < (3,),
-                     "Seed-specific tests don't work well between python "
-                     "versions. This test is now PY3 only")
     def test_get_more_nodes(self):
         # Yes, these tests are deliberately very fragile. We want to make sure
         # that if someone changes the results the ring produces, they know it.

test/unit/common/ring/test_utils.py

@@ -13,7 +13,6 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-import sys
 import unittest
 from collections import defaultdict
 
@@ -664,9 +663,6 @@ class TestUtils(unittest.TestCase):
         }
         self.assertEqual(device, expected)
 
-    @unittest.skipIf(sys.version_info < (3,),
-                     "Seed-specific tests don't work well between python "
-                     "versions. This test is now PY3 only")
     def test_dispersion_report(self):
         rb = ring.RingBuilder(8, 3, 0)
         rb.add_dev({'id': 0, 'region': 1, 'zone': 0, 'weight': 100,