Remove the route command from dumpstate.

Its output is irrelevant and misleading, because:

1. It only looks at the "main" routing table, which is a last
   resort routing table that is trumped by all other networks and
   cannot even be used by non-root users.
2. The proper way to understand device routing is to look at the
   output of "ip rule" and "ip route", both of which are already
   in the bugreport.

Bug: 26154009
Change-Id: Ice19799639daa156a0d4dbb69915031e5582a8ed