Remove patch for not searching for portal creation when looking down (#5031)

Previous commit 97b2eadf1 pulled upstream change that implements the exact same fix.

CB change: 7029c0a8f3

Co-authored-by: Professor Bloodstone <git@bloodstone.dev>

Spigot-Server-Patches/0645-don-t-search-for-portal-creation-when-looking-down.patch

@@ -1,23 +0,0 @@
-From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
-From: lukas81298 <lukas81298@gmail.com>
-Date: Tue, 5 Jan 2021 14:53:42 +0100
-Subject: [PATCH] don't search for portal creation when looking down
-
-
-diff --git a/src/main/java/net/minecraft/server/BlockFireAbstract.java b/src/main/java/net/minecraft/server/BlockFireAbstract.java
-index 9c42b5df5839ed1759391270bcc6f240388ddd04..392d27916b929881ff05f94325184acc6f0d7b7a 100644
---- a/src/main/java/net/minecraft/server/BlockFireAbstract.java
-+++ b/src/main/java/net/minecraft/server/BlockFireAbstract.java
-@@ -115,7 +115,11 @@ public abstract class BlockFireAbstract extends Block {
-                     break;
-                 }
-             }
--
-+            // Paper start - don't search for portal creation when looking down
-+            if(enumdirection == EnumDirection.DOWN || enumdirection == EnumDirection.UP) {
-+                return false;
-+            }
-+            // Paper end
-             return flag && BlockPortalShape.a((GeneratorAccess) world, blockposition, enumdirection.h().n()).isPresent();
-         }
-     }