remove system property for book size limits

"It was from a different time before books were as jank as they are now. As time has gone on they've only proven to be worse and worse."

patches/server/0559-Add-LivingEntity-clearActiveItem.patch

@@ -1,24 +0,0 @@
-From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
-From: Anrza <andrzejrzeczycki314@gmail.com>
-Date: Wed, 15 Jul 2020 12:08:49 +0200
-Subject: [PATCH] Add LivingEntity#clearActiveItem
-
-
-diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java
-index bb4896eb52ae8031b7374dfdc408da6f2f3cf68e..4b5b9b78356745f6218cd0eb7acebb5bd3879c6b 100644
---- a/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java
-+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java
-@@ -778,6 +778,13 @@ public class CraftLivingEntity extends CraftEntity implements LivingEntity {
-         return getHandle().getUseItem().asBukkitMirror();
-     }
- 
-+    // Paper start
-+    @Override
-+    public void clearActiveItem() {
-+        getHandle().stopUsingItem();
-+    }
-+    // Paper end
-+
-     @Override
-     public int getItemUseRemainingTime() {
-         return getHandle().getUseItemRemainingTicks();