Avoid defined word in definition

JJ · JJ · commit 77e41134af15 · 2018-09-10T12:35:52.000+02:00
diff --git a/doc/Type/Mix.pod6 b/doc/Type/Mix.pod6
@@ -6,7 +6,7 @@
 
     class Mix does Mixy { }
 
-A C<Mix> is an immutable mix, meaning a collection of distinct elements
+A C<Mix> is an immutable collection of distinct elements
 in no particular order that each have a real-number weight assigned to
 them. (For I<mutable> mixes, see L<MixHash> instead.)
 
