Removed unneeded instanceof

src/main/java/com/gmail/nossr50/listeners/HardcoreListener.java

@@ -22,11 +22,9 @@ public class HardcoreListener implements Listener {
         Player player = event.getEntity(); //Note this returns a Player object for this subevent
 
         if (!Permissions.getInstance().hardcoremodeBypass(player)) {
-            if (player.getKiller() instanceof Player) {
             if (Config.getInstance().getHardcoreVampirismEnabled()) {
                 Hardcore.invokeVampirism(player.getKiller(), player);
             }
-            }
 
             Hardcore.invokeStatPenalty(player);
         }