Jsdoc error at jakefile #25657

While doing #25656 I see that jakefile has an error at https://github.com/Microsoft/TypeScript/blob/47e513e1517b4d7e96c4a31448189fea4d9534ab/Jakefile.js#L504
because that function has three needed parameters. See jsdoc at implementation (the third is not optional):
https://github.com/Microsoft/TypeScript/blob/47e513e1517b4d7e96c4a31448189fea4d9534ab/Jakefile.js#L816-L839

The implementation treats the third parameter as optional, but the only call to this function don't use it.
Is better remove the third parameter or make it optional?

CC Ryan Cavanaugh (@RyanCavanaugh) since you changed this code the last time.