Remove unused nexthops from struct ofp_rt_rule.
Remove unused nexthops from struct ofp_rt_rule.

Signed-off-by: Jere Leppänen <14957520de8d9815e0c353a07fe23c737f0171e9@nokia.com>
Reviewed-by: Sirshak Das <380db8dd6c2f8c5c272b1de3ca80f9519fdb7fdc@arm.com>

OpenFastPath/ofp,OpenFastPath/ofp,OpenFastPath/ofp,OpenFastPath/ofp