Revert "Address coderabbit review"

This reverts commit 384696d.

Attachment references should be optional, and omitted if not present

Author: davidthornton

src/signed-xml.ts

@@ -1160,7 +1160,7 @@ export class SignedXml {
    * Adds all references to the SignedInfo after the signature placeholder is inserted.
    */
   private addAllReferences(doc: Document, signatureElem: Element, prefix?: string): void {
-    if (!utils.isArrayHasLength(this.references) && !utils.isArrayHasLength(this.attachmentReferences)) {
+    if (!utils.isArrayHasLength(this.references)) {
       return;
     }