upstream objection to -m

[MylesBorins]

see nodejs/ecmascript-modules#64 (comment)

I've removed it in nodejs/node@a3510b1, anyone have concerns with this?

[MylesBorins]

in being hasty to get things in order I ended up rebasing this fix into the upstream PR (and module-lkgr).

I've archived this change, so that we can easily revert it, in https://github.com/MylesBorins/node/pull/new/remove-m