deps: remove isolate group check

Author: joyeecheung

deps/v8/src/init/isolate-group.cc

@@ -361,7 +361,7 @@ IsolateGroup* IsolateGroup::New() {
 // static
 void IsolateGroup::ReleaseDefault() {
   IsolateGroup* group = GetDefault();
-  CHECK_EQ(group->reference_count_.load(), 1);
+  // CHECK_EQ(group->reference_count_.load(), 1);
   CHECK(!group->has_shared_space_isolate());
   group->Release();
   default_isolate_group_ = nullptr;