Printing: Delete dead code in PrintJob and cleanup corresponding code in Prin...

chrome/browser/printing/print_job_worker.h

Index: chrome/browser/printing/print_job_worker.h
===================================================================
--- chrome/browser/printing/print_job_worker.h	(revision 74700)
+++ chrome/browser/printing/print_job_worker.h	(working copy)
@@ -57,9 +57,6 @@
   // This is the only function that can be called in a thread.
   void Cancel();
 
-  // Cancels the Print... dialog box if shown, noop otherwise.
-  void DismissDialog();
-
  protected:
   // Retrieves the context for testing only.
   PrintingContext* printing_context() { return printing_context_.get(); }