Open the Google Doc.
Open the page you want to delete.
Click anywhere on the page.
Press Backspace repeatedly until the page content is removed.
If the page is blank due to formatting, click near the top of the blank page and press Backspace.
If the blank page is caused by an extra page break, click before the page break and press Delete.
To remove a manual page break: click the text just before the break, then press Delete.
To remove extra section breaks: click on the line with the break, then press Delete.
If needed, place the cursor on the blank page and press Delete or Backspace until it disappears.