diff --git a/src/wormhole/codes.py b/src/wormhole/codes.py
deleted file mode 100644
index 708b289..0000000
--- a/src/wormhole/codes.py
+++ /dev/null
@@ -1,114 +0,0 @@
-from __future__ import print_function, unicode_literals
-import os, six
-from .wordlist import (byte_to_even_word, byte_to_odd_word,
-                       even_words_lowercase, odd_words_lowercase)
-
-def make_code(channel_id, code_length):
-    assert isinstance(channel_id, type("")), type(channel_id)
-    words = []
-    for i in range(code_length):
-        # we start with an "odd word"
-        if i % 2 == 0:
-            words.append(byte_to_odd_word[os.urandom(1)].lower())
-        else:
-            words.append(byte_to_even_word[os.urandom(1)].lower())
-    return "%s-%s" % (channel_id, "-".join(words))
-
-def extract_channel_id(code):
-    channel_id = int(code.split("-")[0])
-    return channel_id
-
-class CodeInputter:
-    def __init__(self, initial_channelids, get_channel_ids, code_length,
-                 used_completion_f):
-        self._initial_channelids = initial_channelids
-        self._get_channel_ids = get_channel_ids
-        self.code_length = code_length
-        self.last_text = None # memoize for a speedup
-        self.last_matches = None
-        self._used_completion_f = used_completion_f
-
-    def get_current_channel_ids(self):
-        if self._initial_channelids is not None:
-            channelids = self._initial_channelids
-            self._initial_channelids = None
-            return channelids
-        return self._get_channel_ids()
-
-    def wrap_completer(self, text, state):
-        try:
-            return self.completer(text, state)
-        except Exception as e:
-            # completer exceptions are normally silently discarded, which
-            # makes debugging challenging
-            print("completer exception: %s" % e)
-            raise e
-
-    def completer(self, text, state):
-        self._used_completion_f()
-        #if state == 0:
-        #    print("", file=sys.stderr)
-        #print("completer: '%s' %d '%d'" % (text, state,
-        #                                   readline.get_completion_type()),
-        #      file=sys.stderr)
-        #sys.stderr.flush()
-        pieces = text.split("-")
-        last = pieces[-1].lower()
-        if text == self.last_text and len(pieces) >= 2:
-            # if len(pieces) == 1, skip the cache, so we can re-fetch the
-            # channel_id list
-            matches = self.last_matches
-            #print(" old matches", len(matches), file=sys.stderr)
-        else:
-            if len(pieces) <= 1:
-                channel_ids = self.get_current_channel_ids()
-                matches = [str(channel_id) for channel_id in channel_ids
-                           if str(channel_id).startswith(last)]
-            else:
-                if len(pieces) % 2 == 0:
-                    words = odd_words_lowercase
-                else:
-                    words = even_words_lowercase
-                so_far = "-".join(pieces[:-1]) + "-"
-                matches = sorted([so_far+word for word in words
-                                  if word.startswith(last)])
-            self.last_text = text
-            self.last_matches = matches
-            #print(" new matches:", matches, file=sys.stderr)
-        if state >= len(matches):
-            return None
-        match = matches[state]
-        if len(pieces) < 1+self.code_length:
-            match += "-"
-        #print(" match: '%s'" % match, file=sys.stderr)
-        #sys.stderr.flush()
-        return match
-
-
-def input_code_with_completion(prompt, initial_channelids, get_channel_ids,
-                               code_length):
-    used_completion = []
-    def used_completion_f():
-        used_completion.append(True)
-    try:
-        import readline
-        c = CodeInputter(initial_channelids, get_channel_ids, code_length,
-                         used_completion_f)
-        if readline.__doc__ and "libedit" in readline.__doc__:
-            readline.parse_and_bind("bind ^I rl_complete")
-        else:
-            readline.parse_and_bind("tab: complete")
-        readline.set_completer(c.wrap_completer)
-        readline.set_completer_delims("")
-    except ImportError:
-        pass
-    code = six.moves.input(prompt)
-    # Code is str(bytes) on py2, and str(unicode) on py3. We want unicode.
-    if isinstance(code, bytes):
-        code = code.decode("utf-8")
-    return (code, bool(used_completion))
-
-if __name__ == "__main__":
-    code = input_code_with_completion("Enter wormhole code: ",
-                                      [], lambda: [], 2)
-    print("code is:", code)