[#674] object/put: Use pseudo worker pool for local operations

After storage engine started to limit number of PUT operations there is no
need to limited worker pool in Object Put service.

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>

cmd/neofs-node/config.go

@@ -193,7 +193,7 @@ type cfgLocalStorage struct {
 }
 
 type cfgObjectRoutines struct {
-	putRemote, putLocal *ants.Pool
+	putRemote *ants.Pool
 }
 
 type cfgControlService struct {
@@ -441,11 +441,6 @@ func initObjectPool(cfg *config.Config) (pool cfgObjectRoutines) {
 		fatalOnErr(err)
 	}
 
-	pool.putLocal, err = ants.NewPool(objectconfig.Put(cfg).PoolSizeLocal(), optNonBlocking)
-	if err != nil {
-		fatalOnErr(err)
-	}
-
 	return pool
 }