title: how do I clear a slice of the state
body: <p>Is there an elegant way to clear out slices of a state?  I have 7 slices of data in my state and I want to keep one active while erasing the rest of them.  Do I need to run through each of my reducers and manually erase the slices in each one, or is there another way?</p>
  
  <p>Thanks in advance...</p>