Burnin doesn't need a Processor

In 2.0 burnin submits job to the master daemon, so it doesn't need to
create an internal Processor anymore. Even if the processor is not used
anywhere in the burnin code it was still initialized as a leftover of
how burnin used to work. Fixing this.

Reviewed-by: iustinp

tools/burnin

@@ -64,7 +64,6 @@ class Burner(object):
     """Constructor."""
     logger.SetupLogging(program="ganeti/burnin", debug=False)
     self._feed_buf = StringIO()
-    self.proc = mcpu.Processor(feedback=self.Feedback)
     self.nodes = []
     self.instances = []
     self.to_rem = []