Remove Invalidated Metadata

Bukkit was using an unimplemented method to invalidate plugin meta.

Spigot-API-Patches/0032-Remove-Invalidated-Metadata.patch

@@ -0,0 +1,23 @@
+From 67435787acb9ca2a08e976e4c00b2c4cb612d8b0 Mon Sep 17 00:00:00 2001
+From: Aikar <aikar@aikar.co>
+Date: Tue, 16 Jul 2013 21:26:50 -0400
+Subject: [PATCH] Remove Invalidated Metadata
+
+On reload, metadata will be cleared
+
+diff --git a/src/main/java/org/bukkit/metadata/MetadataStoreBase.java b/src/main/java/org/bukkit/metadata/MetadataStoreBase.java
+index 64c0f0a..8602669 100644
+--- a/src/main/java/org/bukkit/metadata/MetadataStoreBase.java
++++ b/src/main/java/org/bukkit/metadata/MetadataStoreBase.java
+@@ -119,7 +119,7 @@ public abstract class MetadataStoreBase<T> {
+         Validate.notNull(owningPlugin, "Plugin cannot be null");
+         for (Map<Plugin, MetadataValue> values : metadataMap.values()) {
+             if (values.containsKey(owningPlugin)) {
+-                values.get(owningPlugin).invalidate();
++                values.remove(owningPlugin); // Paper - Remove bad metadata, invalidate() is not implemented
+             }
+         }
+     }
+-- 
+2.7.4
+