Issue 4374 - Made Python code part of jshydra comply with our coding practices

utils.py

Index: utils.py
===================================================================
deleted file mode 100644
--- a/utils.py
+++ /dev/null
@@ -1,76 +0,0 @@
-# This Source Code is subject to the terms of the Mozilla Public License
-# version 2.0 (the "License"). You can obtain a copy of the License at
-# http://mozilla.org/MPL/2.0/.
-
-import os
-import platform
-import io
-import zipfile
-
-try:
-    from urllib.request import urlopen
-except ImportError:
-    import urllib
-    import contextlib
-
-    def urlopen(*args, **kwargs):
-        return contextlib.closing(urllib.urlopen(*args, **kwargs))
-
-JSSHELL_DIR = 'mozilla-esr31'
-JSSHELL_URL = ('https://ftp.mozilla.org/pub/mozilla.org/firefox/nightly'
-               '/2015/02/2015-02-25-00-22-19-{}'
-               '/jsshell-{{}}.zip'.format(JSSHELL_DIR))
-
-JSSHELL_SUPPORTED_PLATFORMS = {
-    'Windows': 'win32',
-    'Linux': {
-        'i686': 'linux-i686',
-        'x86_64': 'linux-x86_64'
-    },
-    'Darwin': 'mac'
-}
-
-
-def ensureJSShell():
-    path = os.environ.get('SPIDERMONKEY_BINARY')
-    if path and os.path.isfile(path):
-        return path
-
-    baseDir = os.path.dirname(__file__)
-    system = platform.system()
-
-    try:
-        build = JSSHELL_SUPPORTED_PLATFORMS[system]
-        if isinstance(build, dict):
-            build = build[platform.machine()]
-    except KeyError:
-        raise Exception('Platform {} ({}) not supported by JS shell'.format(
-            system, platform.machine()
-        ))
-
-    shell_dir = os.path.join(baseDir, JSSHELL_DIR + "-" + build)
-    if not os.path.exists(shell_dir):
-        os.makedirs(shell_dir)
-    if system == 'Windows':
-        path = os.path.join(shell_dir, 'js.exe')
-    else:
-        path = os.path.join(shell_dir, 'js')
-
-    if os.path.exists(path):
-        return path
-
-    with urlopen(JSSHELL_URL.format(build)) as response:
-        data = response.read()
-
-    with zipfile.ZipFile(io.BytesIO(data)) as archive:
-        archive.extractall(shell_dir)
-
-    if not os.path.exists(path):
-        raise Exception('Downloaded package didn\'t contain JS shell executable')
-
-    try:
-        os.chmod(path, 0o700)
-    except:
-        pass
-
-    return path