org-export.el: Revert an erroneous commit, sigh

contrib/lisp/org-export.el

@@ -4396,15 +4396,6 @@ Return an error if key pressed has no associated command."
 	(org-e-odt-export-to-odt
 	 (memq 'subtree optns) (memq 'visible optns) (memq 'body optns))
 	'system))
-      ;; Export with `e-freemind' back-end.
-      (?m
-       (org-e-freemind-export-to-freemind
-	(memq 'subtree optns) (memq 'visible optns) (memq 'body optns)))
-      (?M
-       (org-open-file
-	(org-e-freemind-export-to-freemind
-	 (memq 'subtree optns) (memq 'visible optns) (memq 'body optns))
-	'system))
       ;; Publishing facilities
       (?F
        (org-e-publish-current-file (memq 'force optns)))