Remove printf from xml decls

layouts/_default/list.atom.xml

@@ -37,7 +37,7 @@
 
 {{ $title := delimit $titles " · " }}
 
-{{ printf "<?xml version=\"1.0\" encoding=\"utf-8\"?>" | safeHTML }}
+<?xml version="1.0" encoding="utf-8"?>
 
 <feed {{ with $language }} xml:lang="{{ . }}" {{ end }} xmlns="http://www.w3.org/2005/Atom">
     {{ range $authors }}

layouts/_default/list.rss.xml

@@ -36,7 +36,7 @@
 
 {{ $title := delimit $titles " · " }}
 
-{{ printf "<?xml version=\"1.0\" encoding=\"utf-8\"?>" | safeHTML }}
+<?xml version="1.0" encoding="utf-8"?>
 
 <rss version="2.0" {{ with $language }} xml:lang="{{ . }}" {{ end }} xmlns:atom="http://www.w3.org/2005/Atom">
     <channel>