Bug 1576097 - Remove mozbuild.util.encode again. r=nalexander

This time, existing config.status trying to import it will throw an exception
that will trigger a re-configure.

Differential Revision: https://phabricator.services.mozilla.com/D43215

--HG--
extra : moz-landing-system : lando

python/mozbuild/mozbuild/util.py

@@ -23,7 +23,6 @@ import sys
 import time
 
 from collections import (
-    Iterable,
     OrderedDict,
 )
 from io import (
@@ -1297,24 +1296,6 @@ def indented_repr(o, indent=4):
     return ''.join(recurse_indented_repr(o, 0))
 
 
-# Please do not use this function. It's only kept for backwards compatibility
-# with older config.status files that may lay around before a CLOBBER.
-def encode(obj, encoding='utf-8'):
-    '''Recursively encode unicode strings with the given encoding.'''
-    if isinstance(obj, dict):
-        return {
-            encode(k, encoding): encode(v, encoding)
-            for k, v in six.iteritems(obj)
-        }
-    if isinstance(obj, bytes):
-        return obj
-    if isinstance(obj, six.text_type):
-        return obj.encode(encoding)
-    if isinstance(obj, Iterable):
-        return [encode(i, encoding) for i in obj]
-    return obj
-
-
 def patch_main():
     '''This is a hack to work around the fact that Windows multiprocessing needs
     to import the original main module, and assumes that it corresponds to a file