Drop manual isEditable copy in CraftSign

Signs no longer have a specific isEdiable state, the entire API in this
regard needs updating/deprecation. The boolean field is completely gone,
replaced by a uuid (which will need a new setEditingPlayer(UUID) method
on the Sign interface), and the current upstream implementation of
setEdiable simply flips the is_waxed state.

This patch is hence not needed as it neither allows editing (which will
be redone in a later patch) nor is required to copy the is_waxed boolean
flag as it lives in the signs compound tag and is covered by applyTo.

patches/server/0669-Add-ItemFactory-getSpawnEgg-API.patch

@@ -1,28 +0,0 @@
-From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
-From: William Blake Galbreath <blake.galbreath@gmail.com>
-Date: Thu, 14 Oct 2021 12:09:39 -0500
-Subject: [PATCH] Add ItemFactory#getSpawnEgg API
-
-
-diff --git a/src/main/java/org/bukkit/craftbukkit/inventory/CraftItemFactory.java b/src/main/java/org/bukkit/craftbukkit/inventory/CraftItemFactory.java
-index f5610d0746b67dfe69dc79d71c4d082c083f2ee4..b32c06b1f03751c164da7049976c473dff20e4ef 100644
---- a/src/main/java/org/bukkit/craftbukkit/inventory/CraftItemFactory.java
-+++ b/src/main/java/org/bukkit/craftbukkit/inventory/CraftItemFactory.java
-@@ -508,5 +508,17 @@ public final class CraftItemFactory implements ItemFactory {
-             entity.getUniqueId().toString(),
-             new net.md_5.bungee.api.chat.TextComponent(customName));
-     }
-+
-+    @Override
-+    public ItemStack getSpawnEgg(org.bukkit.entity.EntityType type) {
-+        if (type == null) {
-+            return null;
-+        }
-+        String typeId = type.getKey().toString();
-+        net.minecraft.resources.ResourceLocation typeKey = new net.minecraft.resources.ResourceLocation(typeId);
-+        net.minecraft.world.entity.EntityType<?> nmsType = net.minecraft.core.registries.BuiltInRegistries.ENTITY_TYPE.get(typeKey);
-+        net.minecraft.world.item.SpawnEggItem eggItem = net.minecraft.world.item.SpawnEggItem.byId(nmsType);
-+        return eggItem == null ? null : new net.minecraft.world.item.ItemStack(eggItem).asBukkitMirror();
-+    }
-     // Paper end
- }