Place the cursor at the end of the first page
Press Backspace or Delete until the second page content is removed
If the second page is blank, show formatting marks with Ctrl+Shift+8
Delete any extra paragraph marks, page breaks, or section breaks on the second page
If needed, select all content on the second page and press Delete
If the page still remains, reduce the font size or spacing of hidden paragraph marks on the previous page
Save the document