Remove KeyedObject interface (#7680)

patches/server/0294-Workaround-for-vehicle-tracking-issue-on-disconnect.patch

@@ -0,0 +1,24 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: connorhartley <vectrixu+gh@gmail.com>
+Date: Mon, 7 Jan 2019 14:43:48 -0600
+Subject: [PATCH] Workaround for vehicle tracking issue on disconnect
+
+
+diff --git a/src/main/java/net/minecraft/server/level/ServerPlayer.java b/src/main/java/net/minecraft/server/level/ServerPlayer.java
+index 7d9e65b073feb8ff473f23eaca88f20c0411d386..7a187691057a90b71c910dbdcaa6539d334b04ad 100644
+--- a/src/main/java/net/minecraft/server/level/ServerPlayer.java
++++ b/src/main/java/net/minecraft/server/level/ServerPlayer.java
+@@ -1564,6 +1564,13 @@ public class ServerPlayer extends Player {
+     public void disconnect() {
+         this.disconnected = true;
+         this.ejectPassengers();
++
++        // Paper start - Workaround an issue where the vehicle doesn't track the passenger disconnection dismount.
++        if (this.isPassenger() && this.getVehicle() instanceof ServerPlayer) {
++            this.stopRiding();
++        }
++        // Paper end
++
+         if (this.isSleeping()) {
+             this.stopSleepInBed(true, false);
+         }