Remove unneeded app/finders config.autoload path

Every directory under app/ is searched by default

config/application.rb

@@ -13,7 +13,6 @@ module Gitlab
 
     # Custom directories with classes and modules you want to be autoloadable.
     config.autoload_paths += %W(#{config.root}/lib
-                                #{config.root}/app/finders
                                 #{config.root}/app/models/hooks
                                 #{config.root}/app/models/concerns
                                 #{config.root}/app/models/project_services