refactor: remove more unneeded backward.py shims

Gone are:

- iitems
- litems
- iternext
- to_bytes
- to_string
- binary_bytes
- byte_to_int
- bytes_to_ints
- BUILTINS

1 files changed, 0 insertions, 66 deletions

diff --git a/coverage/backward.py b/coverage/backward.py
index 15f4e88a..26d8d0e5 100644
--- a/coverage/backward.py
+++ b/coverage/backward.py
@@ -5,72 +5,6 @@
 
 import sys
 
-# A function to iterate listlessly over a dict's items, and one to get the
-# items as a list.
-try:
-    {}.iteritems
-except AttributeError:
-    # Python 3
-    def iitems(d):
-        """Produce the items from dict `d`."""
-        return d.items()
-
-    def litems(d):
-        """Return a list of items from dict `d`."""
-        return list(d.items())
-else:
-    # Python 2
-    def iitems(d):
-        """Produce the items from dict `d`."""
-        return d.iteritems()
-
-    def litems(d):
-        """Return a list of items from dict `d`."""
-        return d.items()
-
-# Getting the `next` function from an iterator is different in 2 and 3.
-try:
-    iter([]).next
-except AttributeError:
-    def iternext(seq):
-        """Get the `next` function for iterating over `seq`."""
-        return iter(seq).__next__
-else:
-    def iternext(seq):
-        """Get the `next` function for iterating over `seq`."""
-        return iter(seq).next
-
-# Python 3.x is picky about bytes and strings, so provide methods to
-# get them right.
-def to_bytes(s):
-    """Convert string `s` to bytes."""
-    return s.encode('utf8')
-
-def to_string(b):
-    """Convert bytes `b` to string."""
-    return b.decode('utf8')
-
-def binary_bytes(byte_values):
-    """Produce a byte string with the ints from `byte_values`."""
-    return bytes(byte_values)
-
-def byte_to_int(byte):
-    """Turn a byte indexed from a bytes object into an int."""
-    return byte
-
-def bytes_to_ints(bytes_value):
-    """Turn a bytes object into a sequence of ints."""
-    # In Python 3, iterating bytes gives ints.
-    return bytes_value
-
-try:
-    # In Python 2.x, the builtins were in __builtin__
-    BUILTINS = sys.modules['__builtin__']
-except KeyError:
-    # In Python 3.x, they're in builtins
-    BUILTINS = sys.modules['builtins']
-
-
 # imp was deprecated in Python 3.3
 try:
     import importlib