Removed unused Redmine::About class.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@10938 e93f8b46-1217-0410-a6f0-8f06a7374b81

lib/redmine.rb

@@ -23,7 +23,6 @@ rescue LoadError
   # RMagick is not available
 end
 
-require 'redmine/about'
 require 'redmine/access_control'
 require 'redmine/access_keys'
 require 'redmine/activity'