for (var k = app.activeDocument.pages.length-1; k >= 0; k--) {
var page = app.activeDocument.pages[k];
var overflowExist = false;
for (var i = 0; i < page.textFrames.length; i++) {
if (page.textFrames[i].overflows == true) overflowExist = true;
}
if (overflowExist == true) page.remove();
}