Remove Holding Page and Remove secondary Site

Hi there…

I’m fairly new to wordpress and helping friends out with their site.

I’m looking for some help with https://www.sugarsupperclub.co.uk.
When I enter the site the holding page appears which give the option to go to ‘Newry’ or ‘Banbridge’. I just want the Newry page (www.newry.sugarsupperclub.co.uk) to be https://www.sugarsupperclub.co.uk as I want to delete ‘www.banbridge.sugersupperclub.co.uk’ completely. I’m finding this impossible to suss out… can anyone please help?

Basically, I want to delete https://www.banbridge.sugarsupperclub.co.uk and make https://www.newry.sugarsupperclub.co.uk into https://www.sugarsupperclub.co.uk…??

Thanks is advance,
Diane