drop Python 2.6 testing support

Change-Id: I78f21e5794e8ba7a095f03d279247516a241f555

doc/source/development_guidelines.rst

@@ -49,7 +49,7 @@ To execute the unit tests:
 
 * Optionally, run only specific tox builds:
 
-  - `tox -e pep8,py26`
+  - `tox -e pep8,py27`
 
 The functional tests may be executed against a :doc:`development_saio` or
 other running Swift cluster using the command:

doc/source/getting_started.rst

@@ -16,8 +16,7 @@ Swift is written in Python and has these dependencies:
 * The Python packages listed in `the requirements file <https://github.com/openstack/swift/blob/master/requirements.txt>`_
 * Testing additionally requires `the test dependencies <https://github.com/openstack/swift/blob/master/test-requirements.txt>`_
 
-Python 2.6 should work, but it's not actively tested. There is no current
-support for Python 3.
+There is no current support for Python 3.
 
 -------------
 Getting Swift

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = py26,py27,pep8
+envlist = py27,pep8
 minversion = 1.6
 skipsdist = True