[#1598] golangci: Enable unparam linter

To drop unnecessary parameters and return values.

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

pkg/local_object_storage/engine/delete.go

@@ -27,6 +27,8 @@ type DeletePrm struct {
 // DeleteRes groups the resulting values of Delete operation.
 type DeleteRes struct{}
 
+var deleteRes = DeleteRes{}
+
 // WithAddress is a Delete option to set the addresses of the objects to delete.
 //
 // Option is required.
@@ -126,14 +128,14 @@ func (e *StorageEngine) delete(ctx context.Context, prm DeletePrm) (DeleteRes, e
 	})
 
 	if locked.is {
-		return DeleteRes{}, new(apistatus.ObjectLocked)
+		return deleteRes, new(apistatus.ObjectLocked)
 	}
 
 	if splitInfo != nil {
 		e.deleteChildren(ctx, prm.addr, prm.forceRemoval, splitInfo.SplitID())
 	}
 
-	return DeleteRes{}, nil
+	return deleteRes, nil
 }
 
 func (e *StorageEngine) deleteChildren(ctx context.Context, addr oid.Address, force bool, splitID *objectSDK.SplitID) {