          if session_key is None:
              if self.session_key is None:
                  return
              session_key = self.session_key
          with suppress(OSError):
              os.unlink(self._key_to_file(session_key))
  
      def clean(self):
          pass
  
 
</s> remove             with suppress(OSError, IOError):
 </s> add             try: </s> remove             with suppress(TemplateDoesNotExist):
 </s> add             try:
        try:
          if session_key is None:
              if self.session_key is None:
                  return
              session_key = self.session_key
        try:
              os.unlink(self._key_to_file(session_key))
  
      def clean(self):
          pass
  
keep keep keep keep replace keep keep keep keep keep
 Reverted "Fixed #27818 -- Replaced try/except/pass with contextlib.suppress()."

This reverts commit 550cb3a365dee4edfdd1563224d5304de2a57fda
because try/except performs better. 
django/contrib/sessions/backends/file.py