Just go to album and run each line orderly. Note that before run the 3rd line you have to wait till all dialog show up.

facebook.batch.photo.delete

a = document.querySelectorAll('a[data-tooltip]');for(var i=0;i < a.length; i++){a[i].click();}
b = document.querySelectorAll('li[data-label="Delete this photo"]>a');for(var i=0;i < b.length; i++){b[i].click();}
c = document.querySelectorAll('div[class*=uiLayer] button[type="submit"]');for(var i=0;i < c.length; i++){c[i].click();}