How do i remove a Layer from PDF

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itextsharp

I created a pdf with a PdfLayer "PdfStampLayer" and now i want to remove the layer or remove the contants of the Layer.

Anyone could suggest how to remove a layer from pdf?

Note: I do not want to remove all layers. Only the layer Named "PdfStampLayer" i want to remove

PdfLayer stampLayer = new PdfLayer("PdfStampLayer", stamp.Writer);

            for (int i = 1; i <= pdfReader.NumberOfPages; i++) // Must start at 1 because 0 is not an actual page.
            {
                // change the content on top of page 1
                PdfContentByte cb = stamp.GetOverContent(i);
                cb.BeginLayer(stampLayer);

                Rectangle psize = pdfReader.GetPageSize(i);
                float width = psize.Width;
                float height = psize.Height;

                BaseFont bf = BaseFont.CreateFont(BaseFont.HELVETICA, BaseFont.CP1252, BaseFont.NOT_EMBEDDED);
                VerticalText vt = new VerticalText(cb);
                //NX D size drawing stamping
                vt.SetVerticalLayout(width - 150, height - 68, height, 1, 0);
                vt.AddText(new Phrase("SAMPLE", new Font(bf, 13)));

                vt.Go();

                vt.SetVerticalLayout(width - 250, height - 68, height, 1, 0);
                vt.AddText(new Phrase("34567", new Font(bf, 13)));

                vt.Go();
                cb.EndLayer();
            }