Here at Southampton Exam Factory we have a lot of resources from an exam board for a now-defunct specification. The resources all have several footers and headers in gaudy textboxes with logos. Nobody cares now which section of the defunct syllabus the resources were created for. The macro below will remove them all with one click.
Sub RemoveHeaderAndFooter()
Dim oSec As Section
Dim oHead As HeaderFooter
Dim oFoot As HeaderFooter
For Each oSec In ActiveDocument.Sections
For Each oHead In oSec.Headers
If oHead.Exists Then oHead.Range.Delete
Next oHead
For Each oFoot In oSec.Footers
If oFoot.Exists Then oFoot.Range.Delete
Next oFoot
Next oSec
End Sub