docs: updated README; removed opts.Promise, will be removing

Author: Michael Perrotte

README.md

@@ -22,7 +22,6 @@ console.log(await team.lsTeams('npm'))
 
 * [Installing](#install)
 * [Example](#example)
-* [Contributing](#contributing)
 * [API](#api)
   * [team opts](#opts)
   * [`create()`](#create)
@@ -38,23 +37,6 @@ console.log(await team.lsTeams('npm'))
 
 `$ npm install libnpmteam`
 
-### Contributing
-
-The npm team enthusiastically welcomes contributions and project participation!
-There's a bunch of things you can do if you want to contribute! The
-[Contributor Guide](https://github.com/npm/cli/blob/latest/CONTRIBUTING.md)
-outlines the process for community interaction and contribution. Please don't
-hesitate to jump in if you'd like to, or even ask us questions if something
-isn't clear.
-
-All participants and maintainers in this project are expected to follow the
-[npm Code of Conduct](https://www.npmjs.com/policies/conduct), and just
-generally be excellent to each other.
-
-Please refer to the [Changelog](CHANGELOG.md) for project history details, too.
-
-Happy hacking!
-
 ### API
 
 #### <a name="opts"></a> `opts` for `libnpmteam` commands
@@ -69,7 +51,6 @@ A couple of options of note for those in a hurry:
 
 * `opts.token` - can be passed in and will be used as the authentication token for the registry. For other ways to pass in auth details, see the n-r-f docs.
 * `opts.otp` - certain operations will require an OTP token to be passed in. If a `libnpmteam` command fails with `err.code === EOTP`, please retry the request with `{otp: <2fa token>}`
-* `opts.Promise` - If you pass this in, the Promises returned by `libnpmteam` commands will use this Promise class instead. For example: `{Promise: require('bluebird')}`
 
 #### <a name="create"></a> `> team.create(team, [opts]) -> Promise`