Fix to special case Dispose method to be treated as non-action

#1294
@rynowak @yishaigalatzer 
> Let me know if you strongly feel otherwise.

*I feel otherwise.* The specific incantation (using interface map) is designed to handle these cases. If the product code changes -- let's say someone decides to *simplify* it -- there are no tests in place to tell us that we missed something.