avahi: drop unneeded avahi-autopid patch

The reason for the patch is not entirely clear as it dates back to the
original addition of avahi (in 2006), and it contains no description - But
presumably it is to work around a permission issue with the address files,
similar to what is explained here:

https://bugs.launchpad.net/ubuntu/+source/avahi/+bug/83521

That particular issue got fixed by upstream in 2007 using umask(2):

https://github.com/lathiat/avahi/commit/747f75372063371865bf5fc9857982defcffdca4

So the patch isn't needed any more and can be dropped.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/avahi/0001-autoipd-perms.patch

@@ -1,11 +0,0 @@
---- avahi-0.6.14/avahi-autoipd/main.c.cls	2006-09-13 12:49:45.000000000 -0700
-+++ avahi-0.6.14/avahi-autoipd/main.c	2006-09-25 20:34:10.000000000 -0700
-@@ -239,7 +239,7 @@
- 
-     fprintf(f, "%s\n", inet_ntop(AF_INET, &addr, buf, sizeof (buf)));
-     fclose(f);
--
-+    chmod(fn, S_IRUSR|S_IWUSR);
-     return 0;
-     
- fail: