Remove no thread suspension assert in AddImageSpace

Heap::VisitObjects may cause thread suspension for the CC case.

Change-Id: Ibd495690b87dc8731919e1b1164be834c9da02b2
diff --git a/runtime/class_linker.cc b/runtime/class_linker.cc
index e7708c9..cb67a17 100644
--- a/runtime/class_linker.cc
+++ b/runtime/class_linker.cc
@@ -1473,7 +1473,6 @@
   Runtime* const runtime = Runtime::Current();
   gc::Heap* const heap = runtime->GetHeap();
   Thread* const self = Thread::Current();
-  ScopedAssertNoThreadSuspension nts(self, __FUNCTION__);
   StackHandleScope<2> hs(self);
   Handle<mirror::ObjectArray<mirror::DexCache>> dex_caches(
       hs.NewHandle(dex_caches_object->AsObjectArray<mirror::DexCache>()));