Make requestidlecallback work with TS 4.4 DOM (#54081)
Make requestidlecallback work with TS 4.4 DOM (#54081)

* Make requestidlecallback work with TS 4.4 DOM

TS 4.4 improves its types for requestidlecallback. This PR makes DT match those upcoming types.

Needed after microsoft/TypeScript#44684 is merged.

* remove redundant undefined for now
markogresak/DefinitelyTyped