Remove "Auto fix bad Y levels on player login" patch

Fixes #6357
Closes #6508
Closes #6358

patches/server/0647-Expose-protocol-version.patch

@@ -1,22 +0,0 @@
-From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
-From: kennytv <jahnke.nassim@gmail.com>
-Date: Fri, 26 Mar 2021 11:23:17 +0100
-Subject: [PATCH] Expose protocol version
-
-
-diff --git a/src/main/java/org/bukkit/craftbukkit/util/CraftMagicNumbers.java b/src/main/java/org/bukkit/craftbukkit/util/CraftMagicNumbers.java
-index 8ff6d0deb3532515cecdab1f50b8558ef7603f53..719a4811d9a9a754f7893c595d09187c494bbbae 100644
---- a/src/main/java/org/bukkit/craftbukkit/util/CraftMagicNumbers.java
-+++ b/src/main/java/org/bukkit/craftbukkit/util/CraftMagicNumbers.java
-@@ -483,6 +483,11 @@ public final class CraftMagicNumbers implements UnsafeValues {
-     public io.papermc.paper.inventory.ItemRarity getItemStackRarity(org.bukkit.inventory.ItemStack itemStack) {
-         return io.papermc.paper.inventory.ItemRarity.values()[getItem(itemStack.getType()).getRarity(CraftItemStack.asNMSCopy(itemStack)).ordinal()];
-     }
-+
-+    @Override
-+    public int getProtocolVersion() {
-+        return net.minecraft.SharedConstants.getCurrentVersion().getProtocolVersion();
-+    }
-     // Paper end
- 
-     /**