Replace reprod patched mixin with upstream + gradle task for fixing refmap

gradle/reprod/patches/mixin/0003-Fix-for-Gradle-3.patch

@@ -1,25 +0,0 @@
-From 0f250141ba6515dbeffeb0722bf29976850bb323 Mon Sep 17 00:00:00 2001
-From: Jonas Herzig <me@johni0702.de>
-Date: Tue, 8 Aug 2017 19:13:17 +0200
-Subject: [PATCH 3/7] Fix for Gradle 3
-
----
- build.gradle | 2 +-
- 1 file changed, 1 insertion(+), 1 deletion(-)
-
-diff --git a/build.gradle b/build.gradle
-index 165dbe4..0f189ec 100644
---- a/build.gradle
-+++ b/build.gradle
-@@ -92,7 +92,7 @@ dependencies {
- 
- // Task to read ASM library and rename packages
- task renamedASM {
--    outputs.file files(configurations.asm.files.withIndex().collect { file, i -> def dep = configurations.asm.dependencies[i]
-+    outputs.files files(configurations.asm.files.withIndex().collect { file, i -> def dep = configurations.asm.dependencies[i]
-         new File(new File(renamedPackageRoot, "org/spongepowered/mixin-" + dep.name + "/" + dep.version), "mixin-" + file.name).path
-     })
-     ant {
--- 
-2.5.5
-