GSW will not trade Thompson for the sake of trading Thompson. They don't need to, nor do they want to trade Thompson, and he doesn't want to trade Thompson.
The only reason they would move a kid of that talent, would be because that what they have to give up to get back a more talented, potentially transcendent player ala Kevin Love.
So to recap, hes not on the block, and we have no potentially transcendent, potentially franchise altering asset that would warrant such a return.