Don't send itemmeta for books with the hide option enabled (#7734)

patches/server/Hide-unnecessary-itemmeta-from-clients.patch

@@ -91,6 +91,14 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +                    tag.put("Enchantments", enchantments);
 +                }
 +                tag.remove("AttributeModifiers");
++
++                // Books
++                tag.remove("author");
++                tag.remove("filtered_title");
++                tag.remove("pages");
++                tag.remove("filtered_pages");
++                tag.remove("title");
++                tag.remove("generation");
 +            }
 +        }
 +        return copy;

test-plugin/src/main/java/io/papermc/paper/testplugin/TestPlugin.java

@@ -1,8 +1,6 @@
 package io.papermc.paper.testplugin;
 
-import org.bukkit.event.EventHandler;
 import org.bukkit.event.Listener;
-import org.bukkit.event.player.PlayerItemDamageEvent;
 import org.bukkit.plugin.java.JavaPlugin;
 
 public final class TestPlugin extends JavaPlugin implements Listener {
@@ -10,9 +8,4 @@ public final class TestPlugin extends JavaPlugin implements Listener {
     public void onEnable() {
         this.getServer().getPluginManager().registerEvents(this, this);
     }
-
-    @EventHandler
-    public void a(PlayerItemDamageEvent event) {
-        System.out.println(event.getOriginalDamage() + " to " + event.getDamage());
-    }
 }