Don't include distel

[leoliu]

There was a time when the distel project had little activity and visibility. but that was many years ago. Now the project is in good hands and sees more active than wrangler itself; see https://github.com/massemanet/distel. The outdated version included in wrangler causes more harm than good. In fact it often gets in the way. Please consider removing distel from wrangler distribution. Thanks.

[huiqing]

Thanks for the suggestion.