Converting from a 2 x 10 to 1 x 10?

Hi, is this as easy as it sounds? Do i just simply remove the left hand shifter, cable, and front mech. take off the double rings and replace with the new single ring , and do i need a chain guide/tensioner if i do not use a clutch mech??
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Guide needed even if you use a clutch mech unless you also have a narrow/wide chainring, and why wouldn't you frankly.
Little consensus on whether n/w ring and no clutch mech is sufficient to keep the chain on.
XM-057 rigid 29er
I used to lose the chain on my trance regularly, even with a front mech.
Giant Trance
Radon ZR 27.5 Race
Btwin Alur700
Merida CX500
Yes, it's as easy as that. I've recently converted to 1x10. There are some pics of my Trance on the link below with the new set up. I put a 34T narrow wide on with a clutch type rear mech.
Giant Trance
Radon ZR 27.5 Race
Btwin Alur700
Merida CX500