DO NOT MERGE: remove duplicate rules.

klp-modular-dev-plus-aosp has duplicate SELinux rules in
system_server, which don't appear in AOSP or master. Delete
those duplicate rules, as they just make resolving merge
conflicts more difficult.

Change-Id: I0eaae453b887d08bddf16f963cef4c099fe2e9a6

system_server.te

@@ -67,9 +67,6 @@ allow system_server self:netlink_kobject_uevent_socket create_socket_perms;
 # Use generic netlink sockets.
 allow system_server self:netlink_socket create_socket_perms;
 
-# Use generic netlink sockets.
-allow system_server self:netlink_socket create_socket_perms;
-
 # Kill apps.
 allow system_server appdomain:process { sigkill signal };