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: I360ab9c2f196eb5b8cf1c77e4fb8e4120d1c2299
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>