Elimina el plugin Redmine Git Hosting

Finalmente se descarta por los problemas de configuración y potencial
brecha de seguridad al requerir acceso global al puerto ssh.

plugins/redmine_git_hosting/app/use_cases/projects/base.rb

@@ -1,30 +0,0 @@
-module Projects
-  class Base
-
-    include RedmineGitHosting::GitoliteAccessor::Methods
-
-    attr_reader :project
-    attr_reader :options
-
-
-    def initialize(project, opts = {})
-      @project = project
-      @options = opts
-    end
-
-
-    class << self
-
-      def call(project, opts = {})
-        new(project, opts).call
-      end
-
-    end
-
-
-    def call
-      raise NotImplementedError
-    end
-
-  end
-end