revert unrelated change

Author: lunny

models/issues/issue_update.go

@@ -266,11 +266,6 @@ func UpdateIssueAttachments(ctx context.Context, issueID int64, uuids []string)
 			return fmt.Errorf("getAttachmentsByUUIDs [uuids: %v]: %w", uuids, err)
 		}
 		for i := range attachments {
-			if attachments[i].IssueID == issueID {
-				continue
-			} else if attachments[i].IssueID != 0 {
-				return util.NewPermissionDeniedErrorf("update issue attachments permission denied")
-			}
 			attachments[i].IssueID = issueID
 			if err := repo_model.UpdateAttachment(ctx, attachments[i]); err != nil {
 				return fmt.Errorf("update attachment [id: %d]: %w", attachments[i].ID, err)