Bug 599748 - Remove custom |def check_call()|, now that Python 2.4 is...

Bug 599748 - Remove custom |def check_call()|, now that Python 2.4 is unsupported; (Av1) Remove 'util.py'.
r=ted.mielczarek.

build/upload.py

@@ -57,8 +57,7 @@
 
 import sys, os
 from optparse import OptionParser
-from subprocess import Popen, PIPE
-from util import check_call
+from subprocess import PIPE, Popen, check_call
 
 def RequireEnvironmentVariable(v):
     """Return the value of the environment variable named v, or print

build/util.py

-#!/usr/bin/python
-#
-# ***** BEGIN LICENSE BLOCK *****
-# Version: MPL 1.1/GPL 2.0/LGPL 2.1
-#
-# The contents of this file are subject to the Mozilla Public License Version
-# 1.1 (the "License"); you may not use this file except in compliance with
-# the License. You may obtain a copy of the License at
-# http://www.mozilla.org/MPL/
-#
-# Software distributed under the License is distributed on an "AS IS" basis,
-# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
-# for the specific language governing rights and limitations under the
-# License.
-#
-# The Original Code is mozilla.org code.
-#
-# The Initial Developer of the Original Code is
-# The Mozilla Foundation
-# Portions created by the Initial Developer are Copyright (C) 2008
-# the Initial Developer. All Rights Reserved.
-#
-# Contributor(s):
-#  Ted Mielczarek <ted.mielczarek@gmail.com>
-#
-# Alternatively, the contents of this file may be used under the terms of
-# either the GNU General Public License Version 2 or later (the "GPL"), or
-# the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
-# in which case the provisions of the GPL or the LGPL are applicable instead
-# of those above. If you wish to allow use of your version of this file only
-# under the terms of either the GPL or the LGPL, and not to allow others to
-# use your version of this file under the terms of the MPL, indicate your
-# decision by deleting the provisions above and replace them with the notice
-# and other provisions required by the GPL or the LGPL. If you do not delete
-# the provisions above, a recipient may use your version of this file under
-# the terms of any one of the MPL, the GPL or the LGPL.
-#
-# ***** END LICENSE BLOCK *****
-
-try:
-    from subprocess import check_call
-except ImportError:
-    import subprocess
-    def check_call(*popenargs, **kwargs):
-        retcode = subprocess.call(*popenargs, **kwargs)
-        if retcode:
-            cmd = kwargs.get("args")
-            if cmd is None:
-                cmd = popenargs[0]
-                raise Exception("Command '%s' returned non-zero exit status %i" % (cmd, retcode))

client.py

@@ -15,7 +15,7 @@ import sys
 import datetime
 import shutil
 from optparse import OptionParser
-from build.util import check_call
+from subprocess import check_call
 
 topsrcdir = os.path.dirname(__file__)
 if topsrcdir == '':