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/0216-LivingEntity-Hand-Raised-Item-Use-API.patch

@@ -0,0 +1,42 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Aikar <aikar@aikar.co>
+Date: Fri, 29 Jun 2018 00:21:28 -0400
+Subject: [PATCH] LivingEntity Hand Raised/Item Use API
+
+How long an entity has raised hands to charge an attack or use an item
+
+diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java
+index d9f06a7ff7c6b4c60ddbc5d7131916fabd0fc4d2..0aec2e79d053b6cb845ffea393ad431b3d254b83 100644
+--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java
++++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftLivingEntity.java
+@@ -722,5 +722,30 @@ public class CraftLivingEntity extends CraftEntity implements LivingEntity {
+     public void setShieldBlockingDelay(int delay) {
+         getHandle().setShieldBlockingDelay(delay);
+     }
++
++    @Override
++    public ItemStack getActiveItem() {
++        return getHandle().getUseItem().asBukkitMirror();
++    }
++
++    @Override
++    public int getItemUseRemainingTime() {
++        return getHandle().getUseItemRemainingTicks();
++    }
++
++    @Override
++    public int getHandRaisedTime() {
++        return getHandle().getTicksUsingItem();
++    }
++
++    @Override
++    public boolean isHandRaised() {
++        return getHandle().isUsingItem();
++    }
++
++    @Override
++    public org.bukkit.inventory.EquipmentSlot getHandRaised() {
++        return getHandle().getUsedItemHand() == net.minecraft.world.InteractionHand.MAIN_HAND ? org.bukkit.inventory.EquipmentSlot.HAND : org.bukkit.inventory.EquipmentSlot.OFF_HAND;
++    }
+     // Paper end
+ }