system-keyspace: Do not call minimal_setup for the 2nd time

THe system_keyspace::minimal_setup is called by main.cc by hands
already, some steps before the regular ::setup().

Signed-off-by: Pavel Emelyanov <xemul@scylladb.com>

db/system_keyspace.cc

@@ -1265,7 +1265,6 @@ future<> setup(distributed<database>& db,
                distributed<cql3::query_processor>& qp,
                distributed<gms::feature_service>& feat,
                sharded<netw::messaging_service>& ms) {
-    minimal_setup(db, qp);
     return setup_version(feat, ms).then([&db] {
         return update_schema_version(db.local().get_version());
     }).then([] {