SPIGOT-2799: ItemFrame set null error

src/main/java/org/bukkit/craftbukkit/entity/CraftItemFrame.java

@@ -47,14 +47,9 @@ public class CraftItemFrame extends CraftHanging implements ItemFrame {
         this.entity = frame;
     }
 
-
     public void setItem(org.bukkit.inventory.ItemStack item) {
-        if (item == null || item.getTypeId() == 0) {
-            getHandle().setItem(null);
-        } else {
         getHandle().setItem(CraftItemStack.asNMSCopy(item));
     }
-    }
 
     public org.bukkit.inventory.ItemStack getItem() {
         return CraftItemStack.asBukkitCopy(getHandle().getItem());