Hi, if it was me, I'd switch to Outline View and Show 'Level 1'. If there are page breaks or Headings, you can see them easily in what is, effectively, now a list and just highlight the line of each page you don't want and hit the delete key. It should take the page break with it.

If there are no page breaks (though this is unlikely) it's still easier to delete in Outline View. If you see nothing, change to Level 2 and so on until you do. Then there are circles to the left of headings, with plus signs in them which toggle between showing and hiding what's within it, and bullets to the left of text, which you can select and hit the delete key, and it'll take out the whole paragraph without any scrolling.

Hope this helps.