I download a trial of LR6 as a replacement for Aperture. I finally decided that I would purchase a copy as there were several features in LR that seemed to work well. One of them was the Dehaze Control in the Develop module. As I was a previous owner of LR1 and LR2. I purchased an Upgrade license for LR6 earl;tier today.
After installing LR6 and running updates, I notice that this particular control seems to be missing.
The Dehaze control is only available in the Creative Cloud version Lightroom CC 2015.1. It will not be offered in LR 6, but presumably it will in LR 7.
Some solutions for adding the Deahze effect to LR 6: