How to remove this dynamically loaded thing?

Hi

sorry I couldn’t find a better title =/
so with Loader’s contentLoaderInfo.applicationDomain.getDefinition, I dynamically loaded a class that’s attached to its .fla
now I created three instances of that class and added them to the stage. But after a trace (inside the constructor) I see that there are actually 4 instances of that class, 3 of them that I just added, and one of them (not on the stage) that’s apparently created by getDefinition (correct me if I’m wrong)

so in the trace window I actually see 4 results. My question is, how do I remove the one that’s not on the stage? I need to do some stage-related stuff with my 3 instances and I don’t want the other one to interfere.

Thanks