sgw: remove an unused variable
sgw: remove an unused variable

Signed-off-by: Ferry Huberts <66e11f9f5d965b69497c7e73d5e808f8b13c1218@pelagic.nl>

sebkur/olsrd,diogomg/olsrd,sebkur/olsrd,sebkur/olsrd,diogomg/olsrd-binary-heap,sebkur/olsrd,sebkur/olsrd,sebkur/olsrd,diogomg/olsrd-binary-heap,diogomg/olsrd-binary-heap,diogomg/olsrd-binary-heap,diogomg/olsrd,diogomg/olsrd,diogomg/olsrd-binary-heap,diogomg/olsrd-binary-heap,diogomg/olsrd,diogomg/olsrd,diogomg/olsrd,diogomg/olsrd,diogomg/olsrd-binary-heap