Do not output the encoded files to the dist folder

[jarvisniu]

Output the encoded files to the dist folder is useless, redundant.
We may be confused: "Why they are still here? Does the plugin take effect?".
And also it will expend more space of the repo and server.
——Well done, 兄弟！

[fansenze]

🎉^1.3.1 will unlink file in production(parcel env)

[jarvisniu]

Great!