Garbage collection/stale styles

I was wondering if there is any notion of garbage collection in Aphrodite. When a component unmounts, and it's styles are no longer being used, is it possible to clean up _**just**_ that components styles? I ask because I have a specific component that can end up generating a lot of different styles over it's lifetime.

I also noticed there is a `resetInjectedStyle` method, but it looks like it just resets the internal keys of which classnames have already been injected into the style tag. Maybe there could be another function that does a little more? When I saw this function I expected it to completely remove all styles for the passed in className. Is there any way to do that?

Start by reading the resetInjectedStyle method and the style injection lifecycle described in the issue, especially what happens when a component unmounts. Determine whether removing styles for one className is compatible with Aphrodite's shared style handling. Done means the expected cleanup behavior and resetInjectedStyle semantics are defined and covered by appropriate tests.

Written by the indexing model from the issue text.