[heap] Do not invoke GC to make heap iterable.

src/debug/debug.cc

Index: src/debug/debug.cc
diff --git a/src/debug/debug.cc b/src/debug/debug.cc
index 7272ee673137699f1c03c2debccb9f69c2061581..6299bf7e5e71d4d0bdba255fbe81408171e26996 100644
--- a/src/debug/debug.cc
+++ b/src/debug/debug.cc
@@ -1319,10 +1319,6 @@ bool Debug::PrepareFunctionForBreakPoints(Handle<SharedFunctionInfo> shared) {
     }
   }
 
-  // Make sure we abort incremental marking.
-  isolate_->heap()->CollectAllGarbage(Heap::kMakeHeapIterableMask,
-                                      "prepare for break points");
-
   bool is_interpreted = shared->HasBytecodeArray();
 
   {