PyUtils: Delete unused bwdcompat module

Tools/PyUtils/python/bwdcompat.py

-# Copyright (C) 2002-2017 CERN for the benefit of the ATLAS collaboration
-
-import subprocess
-
-### monkey-patch subprocess (fwd compat w/ py-3.x) ----------------------------
-def getstatusoutput(cmd, *popenargs, **kwargs):
-    if isinstance(cmd, basestring):
-        cmd = cmd.split()
-    if 'stdout' in kwargs:
-        raise ValueError('stdout argument not allowed, it will be overridden.')
-    kwargs['stdout'] = subprocess.PIPE
-    p = subprocess.Popen(cmd, *popenargs, **kwargs)
-    sc = p.returncode
-    if sc is None:
-        sc = 0
-    fd = p.stdout
-    out= ''.join(list(fd.readlines()))
-    if out[-1:] == '\n': out = out[:-1]
-    return sc,out
-subprocess.getstatusoutput = getstatusoutput
-del getstatusoutput
-
-def getstatus(cmd, *popenargs, **kwargs):
-    return subprocess.getstatusoutput(cmd, *popenargs, **kwargs)[0]
-subprocess.getstatus = getstatus
-del getstatus
-
-def getoutput(cmd, *popenargs, **kwargs):
-    return subprocess.getstatusoutput(cmd, *popenargs, **kwargs)[1]
-subprocess.getoutput = getoutput
-del getoutput
-### ---------------------------------------------------------------------------