variants: simplify M\ variant-class initial-value*.

extra/variants/variants.factor

@@ -8,8 +8,9 @@ IN: variants
 PREDICATE: variant-class < mixin-class "variant?" word-prop ;
 
 M: variant-class initial-value*
-    dup members [ drop f f ]
-    [ nip first dup word? [ t ] [ initial-value* ] if ] if-empty ;
+    members [ f f ] [
+        first dup word? [ t ] [ initial-value* ] if
+    ] if-empty ;
 
 : define-tuple-class-and-boa-word ( class superclass slots -- )
     pick [ define-tuple-class ] dip