In 1 Samuel 17:54, what is the significance of David bringing Goliath's head to Jerusalem while leaving Goliath’s weapons in his tent?

In 1 Samuel 17:54, we read about the aftermath of David's victory over the Philistine champion Goliath. After killing Goliath with a single stone from his sling, David took the giant's sword and cut off his head. He then brought the head to Jerusalem while