Remove KeyedObject interface (#7680)

patches/server/0612-copy-TESign-isEditable-from-snapshots.patch

@@ -0,0 +1,18 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Shane Freeder <theboyetronic@gmail.com>
+Date: Tue, 23 Mar 2021 06:43:30 +0000
+Subject: [PATCH] copy TESign#isEditable from snapshots
+
+
+diff --git a/src/main/java/org/bukkit/craftbukkit/block/CraftSign.java b/src/main/java/org/bukkit/craftbukkit/block/CraftSign.java
+index bfa2345642142ea45460552fce97d5b411a5e48e..59f03dce529f54d9c447ed2bda40da4b8ec8c4a8 100644
+--- a/src/main/java/org/bukkit/craftbukkit/block/CraftSign.java
++++ b/src/main/java/org/bukkit/craftbukkit/block/CraftSign.java
+@@ -116,6 +116,7 @@ public class CraftSign extends CraftBlockEntityState<SignBlockEntity> implements
+             }
+             // Paper end
+         }
++        sign.isEditable = getSnapshot().isEditable; // Paper - copy manually
+     }
+ 
+     public static void openSign(Sign sign, org.bukkit.entity.HumanEntity player) { // Paper - change move open sign to HumanEntity