storage_service: Make fd a reference in remove_node
storage_service: Make fd a reference in remove_node

avikivity/scylla,scylladb/scylla,scylladb/scylla,raphaelsc/scylla,scylladb/scylla,raphaelsc/scylla,scylladb/scylla,duarten/scylla,kjniemi/scylla,avikivity/scylla,raphaelsc/scylla,avikivity/scylla,kjniemi/scylla,duarten/scylla,duarten/scylla,kjniemi/scylla