diff --git a/builtins/safe-default-configuration.txt b/builtins/safe-default-configuration.txt
index 1cc57db..6043ba6 100644
--- a/builtins/safe-default-configuration.txt
+++ b/builtins/safe-default-configuration.txt
@@ -230,9 +230,4 @@ math semantics
 - mathcolor
 - mathsize
 - scriptlevel
-- encoding
-- display
-- linethickness
-- intent
-- arg