remove api that was scheduled for removal

patches/api/0396-Add-transient-modifier-API.patch

@@ -0,0 +1,27 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Malfrador <malfrador@gmail.com>
+Date: Wed, 31 May 2023 21:25:01 +0200
+Subject: [PATCH] Add transient modifier API
+
+
+diff --git a/src/main/java/org/bukkit/attribute/AttributeInstance.java b/src/main/java/org/bukkit/attribute/AttributeInstance.java
+index f08ee26cc4d479e1bfc5264b8cbe721315de91f2..5513174ea545bb5b4fdc028cbaa4c1bb763e2c6d 100644
+--- a/src/main/java/org/bukkit/attribute/AttributeInstance.java
++++ b/src/main/java/org/bukkit/attribute/AttributeInstance.java
+@@ -46,6 +46,16 @@ public interface AttributeInstance {
+      */
+     void addModifier(@NotNull AttributeModifier modifier);
+ 
++    // Paper start - Transient modifier API
++    /**
++     * Add a transient modifier to this instance.
++     * Transient modifiers are not persisted (saved with the NBT data)
++     *
++     * @param modifier to add
++     */
++    void addTransientModifier(@NotNull AttributeModifier modifier);
++    // Paper end
++
+     /**
+      * Remove a modifier from this instance.
+      *