drop legacy footnotes from chronicles example

Author: mojavelinux

examples/chronicles-example.adoc

@@ -14,9 +14,6 @@ Open Source.
 :sectnums:
 :toc:
 :toclevels: 3
-ifeval::["{asciidoctor-version}" < "1.5.7"]
-:legacy-footnoteref:
-endif::[]
 ifdef::backend-pdf[]
 :pdf-theme: chronicles
 :pdf-themesdir: {docdir}
@@ -52,21 +49,11 @@ image::wolpertinger.jpg[Wolpertinger,pdfwidth=50%,link={uri-wolpertinger}]
 You may not be familiar with these {uri-wolpertinger}[ravenous beasts].
 Trust us, they'll eat your shorts and suck loops from your code.
 In light of this danger, we've searched high and wide for the security crew's defensive operations manual.
-ifndef::legacy-footnoteref[]
 We can't find it and the DefOps{empty}footnote:defops[DefOps is a portmanteau of "`defensive`" and "`operations`".] werewolves haven't returned from their rendezvous at Bier Central.
-endif::[]
-ifdef::legacy-footnoteref[]
-We can't find it and the DefOps{empty}footnoteref:[defops,DefOps is a portmanteau of "`defensive`" and "`operations`".] werewolves haven't returned from their rendezvous at Bier Central.
-endif::[]
 They've either eaten each other or fallen victim to the Wolpertingers roaming the streets of ((Antwerp)).
 Quick, hit kbd:[Ctrl,Alt,Backspace] or select menu:File[Quit] and let's bail out of here!
 
-ifndef::legacy-footnoteref[]
 WARNING: Working with DefOps{empty}footnote:defops[] werewolves leads to howling and trying to train aggressive regular expressions with Pavlovian reinforcement.
-endif::[]
-ifdef::legacy-footnoteref[]
-WARNING: Working with DefOps{empty}footnoteref:[defops] werewolves leads to howling and trying to train aggressive regular expressions with Pavlovian reinforcement.
-endif::[]
 
 _Weak light from the hallway trickled across the theater, chased by a distant scream._
 
@@ -93,12 +80,7 @@ Crystalline XML tags relentlessly bombarded the theater.
 </author>
 ----
 
-ifndef::legacy-footnoteref[]
 Despite the assault, we continued our pursuit to draft a DefOps{empty}footnote:defops[] plan.
-endif::[]
-ifdef::legacy-footnoteref[]
-Despite the assault, we continued our pursuit to draft a DefOps{empty}footnoteref:[defops] plan.
-endif::[]
 
 .DefOps Plan
 ====