title: what are the influences after cancelling \hypersetup in org-mode?
body: <p>I make pdf in org-mode with my own preamble, but the PDF or tex file generated always appear the information resulting from:</p>
  
  <pre><code>(format "\\hypersetup{\n  pdfkeywords={%s},\n  pdfsubject={%s},\n  pdfcreator={%s}}\n"
  (org-export-latex-fontify-headline keywords)
  (org-export-latex-fontify-headline description)
  (concat "Emacs Org-mode version " org-version))
  </code></pre>
  
  <p>those cods locate in ~/.emacs.d/org-7.8.11/lisp/org-latex.el</p>
  
  <p>I cancelled it to prevent the useless information appearing at the first page of its PDF-file.
  However is it OK to delete such codes without any function lost?</p>
  
  <p>what influences will be caused by this action?</p>
  
  <p>Thank you for your help.</p>