Don't set outfilesuffix

Author: mojavelinux

sandbox.adoc

@@ -1,10 +1,8 @@
 = Sandbox
-// use additional conditions to support other environments and extensions
-ifdef::env-github[:outfilesuffix: .adoc]
 
 Here's an example of a link:moredocs/another{outfilesuffix}[relative link] to a file in a sub directory using the link inline macro.
 
-Here's an example of a <<moredocs/another#,relative link>> to a file in a sub directory using the xref inline macro.
+Here's an example of a <<moredocs/another#,relative link>> to a file in a sub directory using the inter-document xref inline macro.
 
 ++++
 <table width="100%">