test: Import unittest

Author: jpmckinney

tests/test_aggregations.py

@@ -1,11 +1,6 @@
 import warnings
 from decimal import Decimal
-
-try:
-    import unittest2 as unittest
-except ImportError:
-    import unittest
-
+import unittest
 import agate
 
 from agatestats.aggregations import PearsonCorrelation

tests/test_computations.py

@@ -1,10 +1,5 @@
 from decimal import Decimal
-
-try:
-    import unittest2 as unittest
-except ImportError:
-    import unittest
-
+import unittest
 import agate
 
 from agatestats.computations import ZScores

tests/test_table.py

@@ -1,8 +1,4 @@
-try:
-    import unittest2 as unittest
-except ImportError:
-    import unittest
-
+import unittest
 import agate
 
 import agatestats  # noqa: F401

tests/test_tableset.py

@@ -1,8 +1,4 @@
-try:
-    import unittest2 as unittest
-except ImportError:
-    import unittest
-
+import unittest
 import agate
 
 import agatestats  # noqa: F401