Update design doc vs. macchanger package's own integration.

wiki/src/contribute/design/MAC_address.mdwn

@@ -411,9 +411,8 @@ leaks issue, in addition to other reasons for being discarded:
 * ifupdown hook: A if-pre-up hook would probably work but since we use
   NetworManager the exact behaviour is blurred and not particularly
   well-documented. It doesn't feel robust for this reason.
-  Hence, we disable the macchanger package's built-in way to spoof
-  MAC addresses:
-  [[!tails_gitweb config/chroot_local-patches/disable_macchanger_spoofing.diff]]
+  Hence, we leave the macchanger package's built-in way to spoof
+  MAC addresses disabled.
 
 * NetworkManager hook: NM doesn't trigger events equivalent to
   if-pre-up, so this isn't possible. See the commented parts in: