Remove outdated code of metabase and localstore

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

pkg/local_object_storage/metabase/inhume.go

@@ -0,0 +1,19 @@
+package meta
+
+import (
+	objectSDK "github.com/nspcc-dev/neofs-api-go/pkg/object"
+	"go.etcd.io/bbolt"
+)
+
+// Inhume marks objects as removed but not removes it from metabase.
+func (db *DB) Inhume(target, tombstone *objectSDK.Address) error {
+	return db.boltDB.Update(func(tx *bbolt.Tx) error {
+		graveyard, err := tx.CreateBucketIfNotExists(graveyardBucketName)
+		if err != nil {
+			return err
+		}
+
+		// consider checking if target is already in graveyard?
+		return graveyard.Put(addressKey(target), addressKey(tombstone))
+	})
+}