In the UK, unless you're on virgin (there might be a few others I'm unaware of), you're pretty much forced to have a landline for which you're charged line rental, even if you don't or will never use it.
Yeah that’s not true anymore. You can have broadband without a landline from most providers now. We have internet from BT over a normal telephone cable but don’t have phone service, it was an optional extra.
But if your VDSL signal is coming down the landline then you _are_ using it. At least that's what I told myself to try to feel better about it (FTTP now!)
This used to be the case, but these days if you’re in a fibre area or area with BT’s widely available FTTC offering, BT will happily sell you a “no landline” deal on their website.
Incidentally their landlines on fibre are basically VoIP phones with a battery backup.
Same with most other fibre providers, like Vodafone.
I've been with Vodafone for 10 months now. Wanted to have broadband and two mobile lines. Was forced to get the landline in the package. I just never plugged any phone to the wire.