Remove update_extra_routes()

After Ie6ebb5f8e336e702b746ba9361fe452b390ffd8c , update_router() and
update_extra_routes() do the same operation. So this patch removes
a redundant update_extra_routes() for the code cleanup.

Change-Id: Iee748673f2d59f27de773993729999dc67f7f4d9
2 files changed