diskselector: Remove unreachable codes

Summary:
The soon to be deleted item 'it' is removed from the list at line 356.
So the first item of the list can never be the same one with it,
which means else statement is unreachable.

Test Plan: None

Reviewers: raster, seoz, Hermet

Differential Revision: https://phab.enlightenment.org/D597

legacy/elementary/src/lib/elm_diskselector.c

@@ -359,13 +359,7 @@ _item_del_pre_hook(Elm_Object_Item *item)
      {
         if (sd->items)
           {
-             dit = (Elm_Diskselector_Item *)eina_list_nth(sd->items, 0);
-
-             if (dit != it)
-               sd->selected_item = dit;
-             else
-               sd->selected_item = eina_list_nth(sd->items, 1);
-
+             sd->selected_item = (Elm_Diskselector_Item *)eina_list_nth(sd->items, 0);
              _selected_item_indicate(sd->selected_item);
           }
         else