John, because if/when I decide to move back into the property I will have a smart meter I don't want ...
Can you please not trouble me with this silliness.
It's not silliness, it's a matter of law.
The tenant may well have acted without your permission, just as if he'd had the windows replaced, in which case your remedy would be to require him to arrange their removal and the old ones re-instated, not against the window company who installed them.
If the tenant will not, or cannot, get the meter removed then you will have to evict him and/or sue him for your losses, which I imagine would require you to show that you had suffered a loss, and not
wanting there to be one in a house where you will not be affected by its presence unless you were to move back in would, I imagine, not be considered a loss. Given the widespread beliefs about them, it could more easily be argued that it was a benefit in that it makes your property more attractive to people.
No matter misguided the current roll-out is, and no matter how misleading the advertising, and no matter how undue the pressure applied to people to get them to have them, there are no drawbacks to having one, nor will there be until everybody has one and the "drawbacks" are just the way things are if you choose to have an electricity supply.
As much as I would resist having one installed, I would never make the presence of one a factor when buying a house.
Your tenant has done something irreversible which you don't like, I get that, and everything above must be qualified by IANAL. One of those should probably be consulted, but my best guess is that you are just going to have to suck it up.