[#1639] services/object: Remove non-blocking pools for Put operation

Signed-off-by: Aleksey Savchuk <a.savchuk@yadro.com>

pkg/services/object/common/writer/ec_test.go

@@ -31,7 +31,6 @@ import (
 	"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/version"
 	"git.frostfs.info/TrueCloudLab/tzhash/tz"
 	"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
-	"github.com/panjf2000/ants/v2"
 	"github.com/stretchr/testify/require"
 )
 
@@ -131,9 +130,6 @@ func TestECWriter(t *testing.T) {
 	nodeKey, err := keys.NewPrivateKey()
 	require.NoError(t, err)
 
-	pool, err := ants.NewPool(4, ants.WithNonblocking(true))
-	require.NoError(t, err)
-
 	log, err := logger.NewLogger(nil)
 	require.NoError(t, err)
 
@@ -141,7 +137,6 @@ func TestECWriter(t *testing.T) {
 	ecw := ECWriter{
 		Config: &Config{
 			NetmapKeys:        n,
-			RemotePool:        pool,
 			Logger:            log,
 			ClientConstructor: clientConstructor{vectors: ns},
 			KeyStorage:        util.NewKeyStorage(&nodeKey.PrivateKey, nil, nil),