Revert "Silence byte-compiler"

This reverts commit 722b5e724e6f1fb1ae906e00446cf3f2c18d1da7.

lisp/org.el

@@ -76,7 +76,6 @@
 (require 'calendar)
 (require 'find-func)
 (require 'format-spec)
-(autoload 'format-spec "format-spec")	; Silence "make single".
 
 (or (equal this-command 'eval-buffer)
     (condition-case nil