Eliminates note abour :rotate in example

Author: JJ

doc/Language/glossary.pod6

@@ -35,8 +35,6 @@ some convenient places:
 
     q:w"foo bar";   # ":w" is a Quotelike form modifier adverb
     m:g/a|b|c/;     # ":g" is also
-=comment TODO: Add this back in when :rotate on infix operators is supported
-=comment 4 +> 5 :rotate # ":rotate" is an operator adverb
     @h{3}:exists;   # ":exists" is also, but is known as a subscript adverb
 
 Adverbs are usually expressed with colon pair notation, and for this