We currently have two copies of the playground's playground.js: one in x/tools (the original) and one in x/website (the new home, but currently unused?).

Unify.

/cc @ysmolsky @andybons @dmitshur @katiehockman @cnoellekb

Comment From: andybons

The one in x/website is used by the playground widget on golang.org.

Comment From: dmitshur

This task is a part of the larger "fully stripping down the godoc binary so that it only displays local code documentation" task in https://github.com/golang/go/issues/29206#issuecomment-468807289.

Edit: Created issue #32011 for tracking that more specifically.

Comment From: dmitshur

We should remove the one in x/website, as it's newer ~~and unused~~. A better new home would be inside x/playground, but that can be a separate issue.

This caused confusion in CL 252377.

Edit: Not completely unused, I see https://github.com/golang/go/issues/32007#issuecomment-491935005 above now.