I'm administering this new website.

The previous web admin included a large amount of tiny keywords on top of some of its pages.

I've removed them already.

I need to know if I have to rest the domain with google webmaster or will google notice the change and take action?

thanks in advance.

edit: They are not meta keyword. They are literally text so small that it looks like a fine line of gibberish on the page itself. This clearly violates google guidelines. My point was more: Do I need to tell google that we are not bad pupils anymore.