As Mick Mentions in his remark, "to deem fit" is a bit outdated-fashioned although not, I do think, adequate that you mustn't learn the way to utilize the idiom. I would not simply call it "Victorian" English, as it's a phrase that sees frequent use even nowadays. In December 2017, https://maps.app.goo.gl/JU7hwR6FT2pvRxCo6