Revert "Implements check if item is already present"

This reverts commit d79101645d.

atom.go

@@ -71,10 +71,6 @@ func (this *Feed) readAtom(doc *xmlx.Document) (err error) {
 		list = node.SelectNodes(ns, "entry")
 
 		for _, item := range list {
-			if isItemPresent(ch, item.S(ns, "id"), item.S(ns, "title")) {
-				continue
-			}
-
 			i = new(Item)
 			i.Title = item.S(ns, "title")
 			i.Id = item.S(ns, "id")
@@ -127,19 +123,3 @@ func (this *Feed) readAtom(doc *xmlx.Document) (err error) {
 	}
 	return
 }
-
-func isItemPresent(ch *Channel, id, title string) bool {
-	for _, item := range ch.Items {
-		switch {
-		case len(id) > 0:
-			if item.Id == id {
-				return true
-			}
-		case len(title) > 0:
-			if item.Title == title {
-				return true
-			}
-		}
-	}
-	return false
-}