diff --git a/pfb/parser/schemas.py b/pfb/parser/schemas.py
index feaf4240..c5f6da98 100644
--- a/pfb/parser/schemas.py
+++ b/pfb/parser/schemas.py
@@ -39,9 +39,9 @@ class _CabInputsOutputs(object):
     # and a set containing locations of .yaml configs for pfb workers
     schema = OmegaConf.create(tmp[0])
 
-    # is this still necessary?
-    for worker in schema.keys():
-        for param in schema[worker]['inputs']:
-            if schema[worker]['inputs'][param]['default'] == _UNSET_DEFAULT:
-                schema[worker]['inputs'][param]['default'] = None
+    # # is this still necessary?
+    # for worker in schema.keys():
+    #     for param in schema[worker]['inputs']:
+    #         if schema[worker]['inputs'][param]['default'] == _UNSET_DEFAULT:
+    #             schema[worker]['inputs'][param]['default'] = None