Unwrap Event Exceptions

This was a useless exception wrapper that ends up making
stack traces harder to read as well as the JVM cutting off
the important parts

Nothing catches this exception, so its safe to just get rid
of it and let the REAL exception bubble down

Spigot-API-Patches/0081-PlayerAdvancementCriterionGrantEvent.patch

@@ -1,73 +0,0 @@
-From 37b0fe3449844988fdd20179130e820106c703c7 Mon Sep 17 00:00:00 2001
-From: BillyGalbreath <Blake.Galbreath@GMail.com>
-Date: Fri, 19 Jan 2018 08:15:14 -0600
-Subject: [PATCH] PlayerAdvancementCriterionGrantEvent
-
-
-diff --git a/src/main/java/com/destroystokyo/paper/event/player/PlayerAdvancementCriterionGrantEvent.java b/src/main/java/com/destroystokyo/paper/event/player/PlayerAdvancementCriterionGrantEvent.java
-new file mode 100644
-index 00000000..b65ee9e5
---- /dev/null
-+++ b/src/main/java/com/destroystokyo/paper/event/player/PlayerAdvancementCriterionGrantEvent.java
-@@ -0,0 +1,58 @@
-+package com.destroystokyo.paper.event.player;
-+
-+import org.bukkit.advancement.Advancement;
-+import org.bukkit.entity.Player;
-+import org.bukkit.event.Cancellable;
-+import org.bukkit.event.HandlerList;
-+import org.bukkit.event.player.PlayerEvent;
-+
-+/**
-+ * Called when a player is granted a criteria in an advancement.
-+ */
-+public class PlayerAdvancementCriterionGrantEvent extends PlayerEvent implements Cancellable {
-+    private static final HandlerList handlers = new HandlerList();
-+    private final Advancement advancement;
-+    private final String criterion;
-+    private boolean cancel = false;
-+
-+    public PlayerAdvancementCriterionGrantEvent(Player who, Advancement advancement, String criterion) {
-+        super(who);
-+        this.advancement = advancement;
-+        this.criterion = criterion;
-+    }
-+
-+    /**
-+     * Get the advancement which has been affected.
-+     *
-+     * @return affected advancement
-+     */
-+    public Advancement getAdvancement() {
-+        return advancement;
-+    }
-+
-+    /**
-+     * Get the criterion which has been granted.
-+     *
-+     * @return granted criterion
-+     */
-+    public String getCriterion() {
-+        return criterion;
-+    }
-+
-+    public boolean isCancelled() {
-+        return cancel;
-+    }
-+
-+    public void setCancelled(boolean cancel) {
-+        this.cancel = cancel;
-+    }
-+
-+    @Override
-+    public HandlerList getHandlers() {
-+        return handlers;
-+    }
-+
-+    public static HandlerList getHandlerList() {
-+        return handlers;
-+    }
-+}
--- 
-2.18.0
-