home: import: Compare procedures with 'eq?'.

'procedure-name' is a debugging aid and cannot be reliably used to
check for procedure equality.

* guix/scripts/home/import.scm (configurations+modules): Remove use of
'procedure-name'.

guix/scripts/home/import.scm

@@ -98,8 +98,7 @@ service declaration."
                                          destination-directory "/" file))
                              proc)))))
                  %files+configurations-alist)
-     (lambda (x y)
-       (equal? (procedure-name x) (procedure-name y)))))
+     eq?))
 
   (map (lambda (proc) (proc destination-directory)) configurations))