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' For complete examples and data files, please go to https://github.com/groupdocs-watermark/GroupDocs.Watermark-for-.NET
Using doc As CellsDocument = Document.Load(Of CellsDocument)(Utilities.MapSourceFilePath(FilePath))
    For Each section As CellsHeaderFooterSection In doc.Worksheets(0).HeadersFooters(OfficeHeaderFooterType.HeaderPrimary).Sections
        section.Script = Nothing
        section.Image = Nothing
    Next
    doc.Save()
End Using