Well, that the feature called "Dehaze" and that comes with Lightroom CC 2015 ( Cloud Version), Dehaze is not included in Lightroom 6 standalone version.
Refer: Lightroom 6 Dehaze | Cut through the fog (Adding the feature)
Thread: Invoke the Dehaze effect in LR6
Hope it helps.
thanks for the reply . Cursed Adobe lightroom I purchased with regular license and I am a softvare to here are not released this upgrade ... it is absurd .