So I clicked the link saying "Turn in steamworks trinkets here!" assuming I would be able to specify an amount. Seems it didn't, I know have 1810 Steamwork Trinkets in the bank with no intention of spending them. And I can't find a way to remove them, so I suppose this is permanent? :(

Yes, it's permanent :/ But you can always try selling them by buying items people ask and charging per trinket (you can do so in the advertising forum) or you may hold until next year in case it releases something of your interest

Damn. I should have noticed only the wizard tokens have a 'cash out' link -.-' I bought all items I could possibly want and still have 950 trinkets left, lol. Thank you, I'll look into selling them!

You could always just save them for next year. I like to keep my leftover currencies if I can so I don't have to worry in case I suddenly need a massive amount of items (or don't have as much time) next year