[#96] node: Drop neo-go's slices package

Signed-off-by: Dmitrii Stepanov <d.stepanov@yadro.com>

pkg/local_object_storage/writecache/writecachebbolt/flush.go

@@ -17,7 +17,6 @@ import (
 	objectSDK "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
 	oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
 	"github.com/mr-tron/base58"
-	"github.com/nspcc-dev/neo-go/pkg/util/slice"
 	"go.etcd.io/bbolt"
 	"go.opentelemetry.io/otel/attribute"
 	"go.opentelemetry.io/otel/trace"
@@ -106,12 +105,12 @@ func (c *cache) flushSmallObjects(ctx context.Context) {
 				if len(lastKey) == len(k) {
 					copy(lastKey, k)
 				} else {
-					lastKey = slice.Copy(k)
+					lastKey = bytes.Clone(k)
 				}
 
 				m = append(m, objectInfo{
 					addr: string(k),
-					data: slice.Copy(v),
+					data: bytes.Clone(v),
 				})
 			}
 			return nil