Add DEVSIX reference to TODOs in tagging utilities for proper tags removal

DEVSIX-5472

Autoported commit.
Original commit hash: [01bf7cb63]

Author: yulian-gaponenko

itext/itext.kernel/itext/kernel/pdf/tagutils/TagStructureContext.cs

@@ -848,7 +848,8 @@ private void RemovePageTagFromParent(IStructureNode pageTag, IStructureNode pare
                         RemovePageTagFromParent(structParent, parent.GetParent());
                         PdfIndirectReference indRef = parentStructDict.GetIndirectReference();
                         if (indRef != null) {
-                            // TODO how about possible references to structure element from refs or structure destination for instance?
+                            // TODO DEVSIX-5472 need to clean references to structure element from
+                            //  other structure elements /Ref entries and structure destinations
                             indRef.SetFree();
                         }
                     }

itext/itext.kernel/itext/kernel/pdf/tagutils/TagTreePointer.cs

@@ -509,7 +509,8 @@ public virtual iText.Kernel.Pdf.Tagutils.TagTreePointer RemoveTag() {
             int removedKidIndex = parent.RemoveKid(currentStructElem);
             PdfIndirectReference indRef = currentStructElem.GetPdfObject().GetIndirectReference();
             if (indRef != null) {
-                // TODO how about possible references to structure element from refs or structure destination for instance?
+                // TODO DEVSIX-5472 need to clean references to structure element from
+                //  other structure elements /Ref entries and structure destinations
                 indRef.SetFree();
             }
             foreach (IStructureNode kid in kids) {

port-hash

@@ -1 +1 @@
-f8771af2f52833c1c967a729a80ebb4d6b14056f
+377d5f5dd9988723b09077fcbc85c35a3df04f73