diff --git a/ligo/gracedb/utils.py b/ligo/gracedb/utils.py
index f3a510458fcbecad412786b205cfa73aa4d431f6..fa62e4522dd4035534c8c8df310229b8dad9c598 100644
--- a/ligo/gracedb/utils.py
+++ b/ligo/gracedb/utils.py
@@ -38,20 +38,6 @@ def handle_str_or_list_arg(arg, arg_name):
     return arg
 
 
-# XXX It would be nice to get rid of this if we can.
-# It seems that you can pass python lists via the requests package.
-# That would make putting our lists into comma-separated strings
-# unnecessary.
-def cleanListInput(list_arg):
-    stringified_list = list_arg
-    if isinstance(list_arg, float) or isinstance(list_arg, int):
-        stringified_value = str(list_arg)
-        return stringified_value
-    if not isinstance(list_arg, six.string_types):
-        stringified_list = ','.join(map(str, list_arg))
-    return stringified_list
-
-
 # Parse a datetime object out of the openssl output.
 # Note that this returns a naive datetime object.
 class safe_netrc(netrc):