Definitely get a dropper post, but there's no good reason to get rid of that front derailleur. Don't do it. I've been writing this a couple of times already lately; there seems to be a common misconception around but: 2× is superior to 1×.
What's nice about 1× is that it allows for better rear suspension design (useful in hard-hitting enduro bikes), saves a couple of grams (useful in road racing and cross country) and removes one item that needs maintenance as well as one cable to the handlebars. But I wager that none of this is really very relevant for you, and anyways you wouldn't fully reap the benefits if merely changing a 2× bike to 1×. It's no good just removing the front mech, the chain would jump off way too often, so you would either need to fix it in one position or get a dedicated chain device. (Modern 1× systems prevent this through narrow-wide chanrings, but that requires the entire system to be built for it.) And even then, the design burden that this derailleur brought on your bike is already committed.
On the flip side, 1× requires significantly larger and more disruptive gear jumps, moves more of the weight to the (unsprung!) rear axle, all the while still not offering as big gear-ratio span as a 2× system.
I have an inexpensive Shimano ... think it's also XT with similar specs ... 2×10 on my hardtail, and whenever I ride that bike I'm delighted by the buttery smooth shifts compared to the fancy but clunky 1×12 SRAM Eagle on my Enduro bike.