I like it!

Im new to code wars. Ive recently successfully attempted some kata challenges. For one i submitted it and realised i didnt clean up my code and i tried to refactor the solution but it made a copy. I now have three solutions to the same kata. How do i remove a solution? Thanks in advance

I got this Algo during a tech screening can anyone eleborate on how to solve!

//input
let array = [
{ skill: 'css', user: 'Bill' },
{ skill: 'javascript', user: 'Chad' },
{ skill: 'javascript', user: 'Bill' },
{ skill: 'css', user: 'Sue' },
{ skill: 'javascript', user: 'Sue' },
{ skill: 'html', user: 'Sue' }
];

Expected Output

var newArray = [
{ skill: 'css', users: ['Bill', 'Sue'], count: 2 },
{ skill: 'javascript', users: ['Chad', 'Bill', 'Sue'], count: 3 },
{ skill: 'html', users: ['Sue'], count: 1 }
]