Silence compiler warning

lisp/org-clock.el

@@ -41,6 +41,7 @@
 (declare-function org-table-goto-line "org-table" (n))
 (declare-function org-dynamic-block-define "org" (type func))
 (declare-function w32-notification-notify "w32fns.c" (&rest params))
+(declare-function w32-notification-close "w32fns.c" (&rest params))
 
 (defvar org-frame-title-format-backup nil)
 (defvar org-state)