The with statement is always enabled in Python 2.6

[François Magimel]

According to the Python doc (https://docs.python.org/2.6/reference/compound_stmts.html#with and https://docs.python.org/2/library/__future__.html), the with statement is always enabled in Python 2.6. So, it becomes useless to import it from __future__. As a matter of fact, Horizon requires Python 2.6+ (https://wiki.openstack.org/wiki/Horizon#Requirements) and not Python 2.5 anymore.

[François Magimel (linkid)]

Patch at https://review.openstack.org/#/c/116520/

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/116520
Committed: https://git.openstack.org/cgit/openstack/horizon/commit/?id=60c1477f772fdf7cb53a2f625a29b9033ed19ee1
Submitter: Jenkins
Branch: master

commit 60c1477f772fdf7cb53a2f625a29b9033ed19ee1
Author: François Magimel <email address hidden>
Date: Sun Aug 24 20:56:41 2014 +0200

    Importing with_statement from __future__ is useless

    Python 2.5 is not supported by Horizon and since Python 2.6, the
    with_statement is enabled by default.

    Change-Id: I0b5dc5d3c83c393b4f27ddc1bc1af392a498360c
    Closes-Bug: #1360879