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;