sync_tool is no longer needed

Author: hsbt

Rakefile

@@ -31,11 +31,4 @@ else
   Rake::ExtensionTask.new("psych")
 end
 
-task :sync_tool do
-  require 'fileutils'
-  FileUtils.cp "../ruby/tool/lib/core_assertions.rb", "./test/lib"
-  FileUtils.cp "../ruby/tool/lib/envutil.rb", "./test/lib"
-  FileUtils.cp "../ruby/tool/lib/find_executable.rb", "./test/lib"
-end
-
 task :default => [:compile, :test]