remove document that is not used anymore

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk/utils@43579 20353a03-c40f-0410-a6d1-a30d3c3de9de

cloudooo/handler/pdf/handler.py

@@ -77,6 +77,7 @@ class PDFHandler(object):
         info_name = info_name.replace(":", "")
       info_value = info_value.strip()
       metadata[info_name.lower()] = info_value
+    self.document.trash()
     return metadata
 
   def setMetadata(self, metadata):