The footnote separator & footnote continuation separator are generated automatically by Word when you add footnotes to a document. They only appear on pages that have footnote text and are designed to provide a visual break between the body and the footnote.

If you don't want the separators to appear, you need to modify them. You do that by clicking on View>Draft. Make sure the zoom is set to at least 100%, then clcik on References>Show Notes, to display the footnotes panel at the bottom of the screen. There, you can choose the footnote separator & footnote continuation separator from the dropdown. When you do that, you'll see the 'unwanted' line. Simply delete it (you cannot delete the ¶, though you can format it in a smaller point size and/or as hidden text).

Copying & pasting the content to a new document will not resolve the issue, as you'll get its default separators.

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Cheers,
Paul Edstein
[Fmr MS MVP - Word]