refactor: remove unneeded backward.py shims

Removed were:

- StringIO
- configparser
- string_class
- unicode_class
- range
- zip_longest
- get_thread_id
- path_types
- shlex_quote
- reprlib

1 files changed, 0 insertions, 76 deletions

diff --git a/coverage/backward.py b/coverage/backward.py
index da839d71..15f4e88a 100644
--- a/coverage/backward.py
+++ b/coverage/backward.py
@@ -3,84 +3,8 @@
 
 """Add things to old Pythons so I can pretend they are newer."""
 
-# This file's purpose is to provide modules to be imported from here.
-# pylint: disable=unused-import
-
-import os
 import sys
 
-from datetime import datetime
-
-
-# Pythons 2 and 3 differ on where to get StringIO.
-try:
-    from cStringIO import StringIO
-except ImportError:
-    from io import StringIO
-
-# In py3, ConfigParser was renamed to the more-standard configparser.
-# But there's a py3 backport that installs "configparser" in py2, and I don't
-# want it because it has annoying deprecation warnings. So try the real py2
-# import first.
-try:
-    import ConfigParser as configparser
-except ImportError:
-    import configparser
-
-# What's a string called?
-try:
-    string_class = basestring
-except NameError:
-    string_class = str
-
-# What's a Unicode string called?
-try:
-    unicode_class = unicode
-except NameError:
-    unicode_class = str
-
-# range or xrange?
-try:
-    range = xrange      # pylint: disable=redefined-builtin
-except NameError:
-    range = range
-
-try:
-    from itertools import zip_longest
-except ImportError:
-    from itertools import izip_longest as zip_longest
-
-# Where do we get the thread id from?
-try:
-    from thread import get_ident as get_thread_id
-except ImportError:
-    from threading import get_ident as get_thread_id
-
-try:
-    os.PathLike
-except AttributeError:
-    # This is Python 2 and 3
-    path_types = (bytes, string_class, unicode_class)
-else:
-    # 3.6+
-    path_types = (bytes, str, os.PathLike)
-
-# shlex.quote is new, but there's an undocumented implementation in "pipes",
-# who knew!?
-try:
-    from shlex import quote as shlex_quote
-except ImportError:
-    # Useful function, available under a different (undocumented) name
-    # in Python versions earlier than 3.3.
-    from pipes import quote as shlex_quote
-
-try:
-    import reprlib
-except ImportError:             # pragma: not covered
-    # We need this on Python 2, but in testing environments, a backport is
-    # installed, so this import isn't used.
-    import repr as reprlib
-
 # A function to iterate listlessly over a dict's items, and one to get the
 # items as a list.
 try: