Open your document and double-click the header or footer area. Simply delete any content within the section. If you want to remove the spacing as well, go to “Format” > “Headers & footers”, then set ...

Remove check marks from those check boxes if you don't want Excel to do that. If you choose the "Scale with Document" option, Excel gives the header the same scaling and font size that it applies ...

You can insert or add Header and Footer in Excel spreadsheet using this tutorial. Insert page number, current date and time, etc.