Remove KeyedObject interface (#7680)

patches/server/0198-Allow-spawning-Item-entities-with-World.spawnEntity.patch

@@ -1,24 +0,0 @@
-From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
-From: Aikar <aikar@aikar.co>
-Date: Mon, 4 Jun 2018 20:39:20 -0400
-Subject: [PATCH] Allow spawning Item entities with World.spawnEntity
-
-This API has more capabilities than .dropItem with the Consumer function
-
-Item can be set inside of the Consumer pre spawn function.
-
-diff --git a/src/main/java/org/bukkit/craftbukkit/CraftRegionAccessor.java b/src/main/java/org/bukkit/craftbukkit/CraftRegionAccessor.java
-index 8fb3e18303abbedb9c07319d11619c39743cbaf8..9d247664e5867a31376b3681b7ed0c3404ea46d8 100644
---- a/src/main/java/org/bukkit/craftbukkit/CraftRegionAccessor.java
-+++ b/src/main/java/org/bukkit/craftbukkit/CraftRegionAccessor.java
-@@ -543,6 +543,10 @@ public abstract class CraftRegionAccessor implements RegionAccessor {
-         if (Boat.class.isAssignableFrom(clazz)) {
-             entity = new net.minecraft.world.entity.vehicle.Boat(world, x, y, z);
-             entity.moveTo(x, y, z, yaw, pitch);
-+            // Paper start
-+        } else if (org.bukkit.entity.Item.class.isAssignableFrom(clazz)) {
-+            entity = new net.minecraft.world.entity.item.ItemEntity(world, x, y, z, new net.minecraft.world.item.ItemStack(net.minecraft.world.item.Item.byBlock(net.minecraft.world.level.block.Blocks.DIRT)));
-+            // Paper end
-         } else if (FallingBlock.class.isAssignableFrom(clazz)) {
-             BlockPos pos = new BlockPos(x, y, z);
-             entity = FallingBlockEntity.fall(world, pos, this.getHandle().getBlockState(pos));