A family of Microsoft word processing software products for creating web, email, and print documents.
You can run the following VBA macro. It clears all the content in all headers/footers in the active document.
Sub DeleteHeadersFootersAll()
'Basic VBA macro to delete all header and footer content
'Created by Stefan Blom
Dim s As Section
For Each s In ActiveDocument.Sections
s.Headers(wdHeaderFooterEvenPages).Range.Text = ""
s.Headers(wdHeaderFooterFirstPage).Range.Text = ""
s.Headers(wdHeaderFooterPrimary).Range.Text = ""
s.Footers(wdHeaderFooterEvenPages).Range.Text = ""
s.Footers(wdHeaderFooterFirstPage).Range.Text = ""
s.Footers(wdHeaderFooterPrimary).Range.Text = ""
Next s
End Sub