expunge python 2.6 (#3962)

* expunge python 2.6

* how did THAT happen

* remove another unsupported python from the tox envlist

* hypothesis can now be unconditionally imported
diff --git a/setup.py b/setup.py
index c5a42b2..cf79b66 100644
--- a/setup.py
+++ b/setup.py
@@ -49,9 +49,8 @@
     "pretend",
     "iso8601",
     "pytz",
+    "hypothesis>=1.11.4",
 ]
-if sys.version_info[:2] > (2, 6):
-    test_requirements.append("hypothesis>=1.11.4")
 
 
 # If there's no vectors locally that probably means we are in a tarball and
@@ -260,7 +259,6 @@
         "Operating System :: Microsoft :: Windows",
         "Programming Language :: Python",
         "Programming Language :: Python :: 2",
-        "Programming Language :: Python :: 2.6",
         "Programming Language :: Python :: 2.7",
         "Programming Language :: Python :: 3",
         "Programming Language :: Python :: 3.4",