Remove some XEmacs compat code from mh-alias.el

* lisp/mh-e/mh-alias.el (crm): Don't require for autoloaded
function.
(multi-prompt): Don't require XEmacs specific library.

lisp/mh-e/mh-alias.el

@@ -245,10 +245,6 @@ Blind aliases or users from /etc/passwd are not expanded."
    (t
     (mh-alias-ali alias))))
 
-(eval-and-compile
-  (require 'crm nil t)                 ; completing-read-multiple
-  (require 'multi-prompt nil t))
-
 ;;;###mh-autoload
 (defun mh-read-address (prompt)
   "Read an address from the minibuffer with PROMPT."