Averdrain? (Clean up your files!)

Hello, I'm a little bit curious on why I have found the icons within the folder found at

C:\Riot Games\League of Legends\RADS\projects\lol_air_client\releases\0.0.1.209\deploy\assets\images\abilities

Named the following.

Averdrain_AstralBarrier.png , Averdrain_AstralBeam.png , Averdrain_ConsumeSpirit.png , Averdrain_Detonate.png and Adverdrain_Lockeddown.png

(Insanely out dated.)

Bowmaster (Ashe), Cardmaster (Twisted Fate), Chronokeeper (Zil), Chemical man (singed), Dark Champion (Diana?), waterman (No idea..maybe old day aoshen?),

and well yeah..I mean this has been here for a while now and it even have the out-dated graphics of what seams to be about 1-2 seasons ago. Are you just way to lazy to remove it Riot? cause C'mon even I'm not that lazy to even leave those in there.