Remove compliance setting for now

lib/github/markups.rb

@@ -26,7 +26,6 @@ markup(:wikicloth, /mediawiki|wiki/) do |content|
 end
 markup(:asciidoctor, /adoc|asc(iidoc)?/) do |content|
-  Asciidoctor::Compliance.unique_id_start_index = 1
   Asciidoctor.convert(content, :safe => :secure, :attributes => %w(showtitle=@ idprefix idseparator=- env=github env-github source-highlighter=html-pipeline))
 end