bundled-es build doesn't remove development code

[phillipskevin]

I expected the two minified builds here to have development code removed:

https://github.com/canjs/canjs/blob/a1d3e65d89068743f2c889ce90e4c66f12c4776d/build.js#L74-L95

...but it was not. The minified files aren't removing things wrapped in steal-remove-start or process.env.NODE_ENV !== "production".