Revert "Vpn: Setup routes."

This reverts commit 93f9ebe47437d71bf66c8999f7cffc973f5959ed. It
is incompatible with change I5b2bde0ac5459433fc5749f509072a548532f730
and breaks routing on 4.4.3

Change-Id: I6e730ae66c7a5fdca582cc8c05f13ea8b234d848
(cherry picked from commit 5d2479d162ece30cc63ea63ffc06ad8432c97c35)