diff --git a/opportunity.py b/opportunity.py
index 7cd77bb..102fef1 100644
--- a/opportunity.py
+++ b/opportunity.py
@@ -184,10 +184,6 @@ class Opportunity(
         states={
             'invisible': ~Eval('state').in_(['won'])
         }, depends=['state'])
-    is_prospect = fields.Function(fields.Boolean('Is Prospect'),
-        'get_is_prospect')
-    is_approved = fields.Function(fields.Boolean('Is Approved'),
-        'get_is_approved')
 
     @classmethod
     def __setup__(cls):