Remove obsolete producePromise package

[erights]

About

agoric-sdk/package.json

Line 18 in d9bc9ec

"packages/producePromise",

at
#1329 (review)
@warner writes:

I think this was a typo, because this PR did not also rename packages/produce-promise/everything to packages/producePromise/. This doesn't seem to be hurting anything (maybe yarn just ignores a workspace entry when the corresponding directory is missing?), but it effectively deletes @agoric/produce-promise. So @erights you might as well go ahead and make a PR to delete the packages/produce-promise/ directory, this entry in workspaces, and the .github/workflows/test-all-packages.yml job.

[warner]

@michaelfig oh, did we want to publish "one last version" of @agoric/produce-promise with a deprecation message and a README that points users at the new name?

Probably not important, but if we did want to do that, then before deleting producePromise, we'd want to rename it back to produce-promise, add the deprecation stuff, make a release, and then delete it.

[michaelfig]

Probably not important, but if we did want to do that, then before deleting producePromise, we'd want to rename it back to produce-promise, add the deprecation stuff, make a release, and then delete it.

I think it is legitimate to branch off of an earlier commit, make and tag a release, and never have that tag hit the main branch.