If we want to remove any key from a given object then we have the following method.

1. Using delete

const obj = { a: 1, b: 2, c: 3, d:{ e:2, f:4 } };
delete obj.a;
OR
delete obj['a']
console.log(obj); // { b: 2, c: 3, d:{ e:2, f:4 } }

2. Using rest parameter

const obj = { a: 1, b: 2, c: 3, d:{ e:2, f:4 } };
const {a, ...newObj} = obj
console.log(newObj) //  { b: 2, c: 3, d:{ e:2, f:4 } }