remove rubyforgepublisher, removed from rake

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@8581 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activeresource/Rakefile

@@ -4,7 +4,6 @@ require 'rake/testtask'
 require 'rake/rdoctask'
 require 'rake/packagetask'
 require 'rake/gempackagetask'
-require 'rake/contrib/rubyforgepublisher'
 require File.join(File.dirname(__FILE__), 'lib', 'active_resource', 'version')
 
 PKG_BUILD     = ENV['PKG_BUILD'] ? '.' + ENV['PKG_BUILD'] : ''