assocs: change enum to immutable-sequence.

diff --git a/core/assocs/assocs.factor b/core/assocs/assocs.factor
index 24e1234b1153b53671a2d84f78359672c784c216..4eeeb617e086e8791bd46cb9db595ae15757b0ec 100644 (file)
--- a/core/assocs/assocs.factor
+++ b/core/assocs/assocs.factor
@@ -260,6 +260,4 @@ M: enum length seq>> length ; inline
 
 M: enum nth-unsafe dupd seq>> nth-unsafe 2array ; inline
 
-M: enum set-nth-unsafe seq>> set-nth-unsafe ; inline
-
-INSTANCE: enum sequence
+INSTANCE: enum immutable-sequence