As Mick mentions in his remark, "to deem fit" is a tiny bit past-fashioned but not, I feel, sufficient that you choose to mustn't learn how to make full use of the idiom. I would not Call it "Victorian" English, as It is just a phrase that sees frequent use https://petskyonlinedubai96173.tinyblogging.com/everything-about-uae-pet-store-80869868