Don't override LWRP resources or providers anymore in Chef 12.

Closes https://github.com/opscode/chef/issues/1910.

Now that we're preventing the unforked interval runs in Chef Client, we don't need to reload the LWRP classes anymore. 

/cc: @opscode/client-engineers 


This comment seems unecessary (it doesn't explain any _why_, which is the highest aspiration a comment can live up to) and its wrong.  :scissors: