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

git-review

@@ -26,7 +26,6 @@ import shlex
 import subprocess
 import sys
 import textwrap
-import time
 
 if sys.version < '3':
     import ConfigParser
@@ -43,8 +42,6 @@ else:
     urlparse = urllib.parse.urlparse
     do_input = input
 
-from distutils import version as du_version
-
 version = "1.23"
 
 VERBOSE = False
@@ -148,48 +145,6 @@ def run_command_exc(klazz, *argv, **env):
     return output
 
 
-def update_latest_version(version_file_path):
-    """Cache the latest version of git-review for the upgrade check."""
-
-    if not os.path.exists(CONFIGDIR):
-        os.makedirs(CONFIGDIR)
-
-    if os.path.exists(version_file_path) and not UPDATE:
-        if (time.time() - os.path.getmtime(version_file_path)) < 28800:
-            return
-
-    latest_version = version
-    try:
-        latest_version = json.load(urlopen(PYPI_URL))['info']['version']
-    except Exception:
-        pass
-
-    with open(version_file_path, "w") as version_file:
-        version_file.write(latest_version)
-
-
-def latest_is_newer():
-    """Check if there is a new version of git-review."""
-
-    # Skip version check if distro package turns it off
-    if os.path.exists(GLOBAL_CONFIG):
-        config = dict(check=False)
-        configParser = ConfigParser.ConfigParser(config)
-        configParser.read(GLOBAL_CONFIG)
-        if not configParser.getboolean("updates", "check"):
-            return False
-
-    version_file_path = os.path.join(CONFIGDIR, "latest-version")
-    update_latest_version(version_file_path)
-
-    latest_version = None
-    with open(version_file_path, "r") as version_file:
-        latest_version = du_version.StrictVersion(version_file.read())
-    if latest_version > du_version.StrictVersion(version):
-        return True
-    return False
-
-
 def git_directories():
     """Determine (absolute git work directory path, .git subdirectory path)."""
     cmd = ("git", "rev-parse", "--show-toplevel", "--git-dir")
@@ -953,22 +908,6 @@ def convert_bool(one_or_zero):
     return one_or_zero in ["1", "true", "True"]
 
 
-def print_exit_message(status, needs_update):
-
-    if needs_update:
-        print("""
-***********************************************************
-A new version of git-review is available on PyPI. Please
-update your copy with:
-
-  pip install -U git-review
-
-to ensure proper behavior with gerrit. Thanks!
-***********************************************************
-""")
-    sys.exit(status)
-
-
 def main():
     usage = "git review [OPTIONS] ... [BRANCH]"
 
@@ -1105,7 +1044,6 @@ def main():
     yes = options.yes
     status = 0
 
-    needs_update = latest_is_newer()
     check_remote(branch, remote,
                  config['hostname'], config['port'], config['project'])
 
@@ -1145,9 +1083,9 @@ def main():
 
     if options.rebase:
         if not rebase_changes(branch, remote):
-            print_exit_message(1, needs_update)
+            sys.exit(1)
         if not options.force_rebase and not undo_rebase():
-            print_exit_message(1, needs_update)
+            sys.exit(1)
     assert_one_change(remote, branch, yes, have_hook)
 
     ref = "publish"
@@ -1188,7 +1126,7 @@ def main():
 
     if options.custom_script:
         run_custom_script("post")
-    print_exit_message(status, needs_update)
+    sys.exit(status)
 
 
 if __name__ == "__main__":