Remove custom gai.conf (no longer needed to prefer IPv6)

config-files/gai.conf

@@ -1,9 +0,0 @@
-# Configuration for getaddrinfo(3).
-label ::1/128       0
-label ::/0          1
-label 2002::/16     2
-label ::/96         3
-label ::ffff:0:0/96 4
-label fec0::/10     5
-label fc00::/7      6
-label 2001:0::/32   7