testing/mozjs60: remove leftovers, is in main/

testing/mozjs60/add-exposeToActiveJS.patch

@@ -1,24 +0,0 @@
-Upstream: Yes
-Reason: Required for GJS
-# HG changeset patch
-# User Philip Chimento <philip.chimento@gmail.com>
-# Date 1527544053 25200
-#      Mon May 28 14:47:33 2018 -0700
-# Node ID a50e7374d0952b893f843e9d21d13d5b7ec8564c
-# Parent  a466172aed4bc2afc21169b749b8068a4b98c93f
-Bug 1464912 - Add exposeToActiveJS specialization for JSString. r=sfink
-
-diff --git a/js/public/RootingAPI.h b/js/public/RootingAPI.h
---- a/js/public/RootingAPI.h
-+++ b/js/public/RootingAPI.h
-@@ -719,6 +719,10 @@ struct BarrierMethods<JSString*>
-     static void postBarrier(JSString** vp, JSString* prev, JSString* next) {
-         JS::HeapStringPostBarrier(vp, prev, next);
-     }
-+    static void exposeToJS(JSString* v) {
-+        if (v)
-+            js::gc::ExposeGCThingToActiveJS(JS::GCCellPtr(v));
-+    }
- };
- 
- // Provide hash codes for Cell kinds that may be relocated and, thus, not have