clatd: remove spurious privs

Since the clatd has some code cleanup, these privs are not required
anymore.

Bug: 212345928
Test: manual test
1. Connect to ipv6-only wifi.
2. Try IPv4 traffic.
   $ ping 8.8.8.8

Change-Id: Ib801a190f9c14ee488bc77a43ac59c78c44773ab
1 file changed