Yes. First, select the part of your document containing the page breaks you want to get rid of, or Select All, as the case may be. Next, click on EDIT, then REPLACE.
In the FIND AND REPLACE dialog box, if there's a button marked MORE, click it to get the full range of options.
With your insertion point in the FIND WHAT box, click on the SPECIAL button, and you get a list of special characters. The one you're after is MANUAL PAGE BREAK. Click on this and it puts the string: ^m into the box.
Leave the REPLACE WITH box blank (i.e., replace ^m with nothing) and click on REPLACE ALL.