remove obsolete api since 1.19.3

patches/api/0041-Add-local-difficulty-api.patch

@@ -1,27 +0,0 @@
-From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
-From: BillyGalbreath <blake.galbreath@gmail.com>
-Date: Sat, 9 Jul 2022 00:57:26 -0500
-Subject: [PATCH] Add local difficulty api
-
-
-diff --git a/src/main/java/org/bukkit/World.java b/src/main/java/org/bukkit/World.java
-index 72f1576b8ce5b55b50f053f346ce42c52db4b568..d07b6f40c111c9b131f2995e9796d66f5344c5df 100644
---- a/src/main/java/org/bukkit/World.java
-+++ b/src/main/java/org/bukkit/World.java
-@@ -3974,6 +3974,16 @@ public interface World extends RegionAccessor, WorldInfo, PluginMessageRecipient
-     @Nullable
-     public DragonBattle getEnderDragonBattle();
- 
-+    // Purpur start
-+    /**
-+     * Gets the local difficulty (based on inhabited time) at a location
-+     *
-+     * @param location Location to check
-+     * @return The local difficulty
-+     */
-+    public float getLocalDifficultyAt(@NotNull Location location);
-+    // Purpur end
-+
-     /**
-      * Get all {@link FeatureFlag} enabled in this world.
-      *