Remove Ignore invalid Marker Icon ID's in maps

Spigot has patched this issue inside MapIcon, meaning that we no longer need to maintain this patch; Spigots patch also fixes #668 in that it will verify the length of the array, as well as protect against a negative type value being fetched from the array. Only real change is that Spigots patch returns a MapIcon.Type.PLAYER, instead of the RED_MARKER as originally PR'd by Aikar.

Spigot-API-Patches/0042-Add-ProjectileCollideEvent.patch

@@ -1,4 +1,4 @@
-From 5fba5a4e75e64bfb2b2b73ff39cbe55dd12ee1b9 Mon Sep 17 00:00:00 2001
+From 8a1678e60bc1ddc67b3b8cacbb6761daf1a97fc6 Mon Sep 17 00:00:00 2001
 From: Techcable <Techcable@outlook.com>
 Date: Fri, 16 Dec 2016 21:25:39 -0600
 Subject: [PATCH] Add ProjectileCollideEvent
@@ -6,7 +6,7 @@ Subject: [PATCH] Add ProjectileCollideEvent
 
 diff --git a/src/main/java/com/destroystokyo/paper/event/entity/ProjectileCollideEvent.java b/src/main/java/com/destroystokyo/paper/event/entity/ProjectileCollideEvent.java
 new file mode 100644
-index 0000000..f42e985
+index 00000000..f42e9851
 --- /dev/null
 +++ b/src/main/java/com/destroystokyo/paper/event/entity/ProjectileCollideEvent.java
 @@ -0,0 +1,62 @@
@@ -73,5 +73,5 @@ index 0000000..f42e985
 +    }
 +}
 -- 
-2.9.3
+2.12.2