[PATCH 05/12] doc: asciidoctor: remove unnecessary require

This file is loaded by asciidoctor, the module is already loaded.

In addition to being less redundant this fixes a problem while trying
use a development version of asciidoctor when the gem is available:

  $GEM_HOME/gems/asciidoctor-2.0.15/lib/asciidoctor.rb:51:
    warning: already initialized constant Asciidoctor::RUBY_ENGINE
  $HOME/asciidoctor/lib/asciidoctor.rb:52:
    warning: previous definition of RUBY_ENGINE was here
  ...

That's a bug in asciidoctor, but there's no need to trigger it.

Signed-off-by: Felipe Contreras <redacted>
---
 Documentation/asciidoctor-extensions.rb | 1 -
 1 file changed, 1 deletion(-)

diff --git a/Documentation/asciidoctor-extensions.rb b/Documentation/asciidoctor-extensions.rb
index 70a0956663..423450392d 100644
--- a/Documentation/asciidoctor-extensions.rb
+++ b/Documentation/asciidoctor-extensions.rb

@@ -1,4 +1,3 @@
-require 'asciidoctor'
 require 'asciidoctor/extensions'
 
 module Git

-- 
2.31.1