Remove unused python version checker script

    
The ensure-valid-python script seems to be unused,
and additionally in webkitpy there is already another
version checker implementation.

BUG=none

Review URL: https://codereview.chromium.org/559993002

git-svn-id: svn://svn.chromium.org/blink/trunk@181918 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/Tools/Scripts/ensure-valid-python

-#!/usr/bin/perl -w
-# Copyright (C) 2010 Google Inc. All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions
-# are met:
-#
-# 1.  Redistributions of source code must retain the above copyright
-#     notice, this list of conditions and the following disclaimer.
-# 2.  Redistributions in binary form must reproduce the above copyright
-#     notice, this list of conditions and the following disclaimer in the
-#     documentation and/or other materials provided with the distribution.
-# 3.  Neither the name of Apple Inc. ("Apple") nor the names of
-#     its contributors may be used to endorse or promote products derived
-#     from this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
-# EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-# DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
-# DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
-# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
-# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
-# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-use strict;
-
-use FindBin;
-use Getopt::Long;
-
-use lib $FindBin::Bin;
-use VCSUtils;
-
-sub checkPythonVersion()
-{
-    # Will exit 0 if Python is 2.5 or greater, non-zero otherwise.
-    `python -c "import sys;sys.exit(sys.version_info[:2] < (2,5))"`;
-    return exitStatus($?) == 0;
-}
-
-sub main()
-{
-    my $checkOnly = 0;
-    my $showHelp = 0;
-    my $getOptionsResult = GetOptions(
-        'check-only!' => \$checkOnly,
-        'help|h' => \$showHelp,
-    );
-    if (!$getOptionsResult || $showHelp) {
-        print STDERR <<HELP;
-Usage: $0 [options]
-  --check-only        Check python version only.
-  -h|--help           Show this help message.
-HELP
-        return 1;
-    }
-    # Congrats, your Python is fine.
-    return 0 if checkPythonVersion();
-
-    return 1 if $checkOnly;
-
-    print "Your Python version is insufficient to run WebKit's Python code.  Please update.\n";
-    print "See http://trac.webkit.org/wiki/PythonGuidelines for more info.\n";
-    return 1;
-}
-
-exit(main());