Rewrite the next function.

jedi/evaluate/compiled/fake/builtins.pym

@@ -6,17 +6,6 @@ possible for the auto completion.
 """
 
 
-def next(iterator, default=None):
-    if random.choice([0, 1]):
-        if hasattr("next"):
-            return iterator.next()
-        else:
-            return iterator.__next__()
-    else:
-        if default is not None:
-            return default
-
-
 def iter(collection, sentinel=None):
     if sentinel:
         yield collection()