compat: Silence byte-compiler

* lisp/org-compat.el (org-cycle-hide-drawers): Ignore optional
argument.

lisp/org-compat.el

@@ -663,11 +663,10 @@ region as a drawer without further ado."
 	  (when (invisible-p (max (1- (point)) (point-min)))
 	    (goto-char post)))))))
 
-(defun org-cycle-hide-drawers (state &optional exceptions)
+(defun org-cycle-hide-drawers (state &optional _)
   "Re-hide all drawers after a visibility state change.
 STATE should be one of the symbols listed in the docstring of
-`org-cycle-hook'.  When non-nil, optional argument EXCEPTIONS is
-a list of strings specifying which drawers should not be hidden."
+`org-cycle-hook'."
   (declare (obsolete "use `org-hide-drawer' instead." "Org 9.4"))
   (when (and (derived-mode-p 'org-mode)
 	     (not (memq state '(overview folded contents))))