Revert "netfilter: fib: check correct rtable in vrf setups"

This reverts commit 95ad7ee0 which is
commit 05ef7055 upstream.

It breaks the Android kernel abi and can be brought back in the future
in an abi-safe way if it is really needed.

Bug: 161946584
Change-Id: Id328beec352d4cb802bb50b49c62ef43ae7c078f
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>