storage_proxy: Simplify condition
storage_proxy: Simplify condition

Message-Id: <989afbedffe2eda068a238219c28af33a7deace4@scylladb.com>

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