provenance in rbbt-util-5.6.9

- old
+ new

@@ -10,12 +10,9 @@
 require 'rbbt/workflow/step'
 require 'rbbt/util/misc'
 
 $workdir = Path.setup(File.expand_path(ARGV[0] || '.'))
 
-
-YAML::ENGINE.yamler = 'syck' if defined? YAML::ENGINE and YAML::ENGINE.respond_to? :yamler
-
 def info_files
   $workdir.glob(Step.info_file('**/*'))
 end
 
 def running?(info)