Remove subsection on .indexed()

[rauschma]

IINM, that method was removed from the proposal.

[bergus]

Can we please add .indexed() back to the proposal instead? There was no good reason for removing it.

[Josh-Cena]

See #211

[bergus]

@Josh-Cena Yes, I saw #211 (comment). But while adding the second argument received "mixed feedback", removing .indexed() received opposition, and there were no arguments brought forward. Or did I miss some TC39 meeting discussion?

[ljharb]

@bergus the proposal is now stage 3, as-is, so it's unlikely any changes will be made that aren't motivated by feedback that could only be gleaned from implementation.

As I recall, counter was a replacement for .indexed, and there was opposition to both forms existing.

[michaelficarra]

@bergus indexed is very easy to reproduce given the counter argument of map, so is far less motivated now. It can always be pursued as a separate proposal, but no longer made sense in this "obvious" initial set.

Iterator.prototype.indexed = function() {
	return this.map((elem, counter) => [counter, elem]);
};