As written in the description:
"The Demolisher's HD textures have been removed as they do not add any significant visual improvement. The combination of the Demolisher's movement and the swirling dust makes it hard to tell the difference. Also, you rarely zoom in close when fighting the demolisher, so a higher resolution would have even less effect."
Basically, the more HD textures, the longer the loading times and vram consumption.
Ok, understood.
Didnt know what u meant with "(reason see description)", since it shows nowhere in the web-modportal.
edit: admittingly i checked the "information"-page, not the title of the post/header. I guess that field is just for the creator marked as "description".
So i ended up finding this discussion called "description" and it made me believe that the OP's question was the reason u removed it...