Don't warn about the existence of new releases

[Jeremy Stanley]

The git-review tool is now being packaged actively by most operating systems/distributions popular amongst the current user base, and has been stable without serious usability bugs for some time. As a result, the expectation is that most users are now installing from places other than PyPI and so the somewhat hackish functions which check for and warn users about the existence of new releases have outlived their usefulness.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/42214

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/42214
Committed: http://github.com/openstack-infra/git-review/commit/f93a719a100b92f473d1b07a20ed71bb4566e51b
Submitter: Jenkins
Branch: master

commit f93a719a100b92f473d1b07a20ed71bb4566e51b
Author: Jeremy Stanley <email address hidden>
Date: Thu Aug 15 20:03:31 2013 +0000

    No longer check for new git-review releases

    * git-review(latest_is_newer,main,print_exit_message)
    (update_latest_version): The git-review tool is now being packaged
    actively by most operating systems/distributions popular amongst the
    current user base, and has been stable without serious usability
    bugs for some time. As a result, the expectation is that most users
    are now installing from places other than PyPI and so the somewhat
    hackish functions which check for and warn users about the existence
    of new releases have outlived their usefulness. Removing them to
    pave the way for continued ease of maintainability improvements, and
    also to be one less annoying thing packagers and users have to
    disable downstream.

    Closes-Bug: 1212829
    Change-Id: I9d2ddea794f2b53d4137f0916de4afa029120f59