Delete patch to fix PaperMC/Paper#9612 (#9621)

patches/server/0926-Remove-CraftItemStack-setAmount-null-assignment.patch

@@ -1,30 +0,0 @@
-From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
-From: Josh Roy <joshroy126@gmail.com>
-Date: Mon, 23 Jan 2023 19:19:01 -0500
-Subject: [PATCH] Remove CraftItemStack#setAmount null assignment
-
-This creates a problem with Paper's item serialization
-api where deserialized items, which are internally
-created as a CraftItemStack, will be completely lost if
-#setAmount(0) is invoked (since the underlying handle
-is set to null), while a regular Bukkit ItemStack
-simply sets the amount field to zero, retaining the
-item's data.
-
-Vanilla treats items with zero amounts the same as items
-with less than zero amounts, so this code doesn't create
-a problem with operations on the vanilla ItemStack.
-
-diff --git a/src/main/java/org/bukkit/craftbukkit/inventory/CraftItemStack.java b/src/main/java/org/bukkit/craftbukkit/inventory/CraftItemStack.java
-index d6b9897dcb4715decd4dd0b1b96995e25d789482..8657736cdfe2d5d2a1c0851ca54dd26ce17e0a83 100644
---- a/src/main/java/org/bukkit/craftbukkit/inventory/CraftItemStack.java
-+++ b/src/main/java/org/bukkit/craftbukkit/inventory/CraftItemStack.java
-@@ -147,7 +147,7 @@ public final class CraftItemStack extends ItemStack {
-         }
- 
-         this.handle.setCount(amount);
--        if (amount == 0) {
-+        if (false && amount == 0) { // Paper - remove CraftItemStack#setAmount null assignment
-             this.handle = null;
-         }
-     }