It is an invalid document, the contents were moved to March of the Ents a while back so I stubbed the doc out and put in a #REDIRECT on it as listed on line 1 of this post. (I figured 'just incase' it is used somewhere, just redirect...)
The syntax is correct, I double checked looking at the {{D}} template, which redirects successfully to the {{Delete}} template but it just doesn't seem to work.