Remove all user from a group - preferably not 25 at a time!

[HGrigsby]

I'm hoping there is a easy way to remove multiple users from a group/team in bulk.

One of our groups has ended up being populated with most of the organisation by mistake and I'd like to get it back to what it should be.

I did wonder about creating a new team with the correct users in it but we have reporting that uses the organisation ID.  Any suggestions would be more than welcome

Thanks 

Helen