remove extraneous command

Author: saulshanabrook

README.md

@@ -178,7 +178,7 @@ The Jupyter Git extension is part of [Project Jupyter](http://jupyter.org/) and
 
 This project follows the [all-contributors](https://github.com/all-contributors/all-contributors) specification. Contributions of any kind welcome!
 
-To add yourself, or someone else, to this list you can either [use the bot](https://allcontributors.org/docs/en/bot/usage) (`@all-contributors please add <username> for <contributions>`) or [the CLI](https://allcontributors.org/docs/en/cli/usage) (`jlpm all-contributors add <username> <contributions> && jlpm all-contributors generate`).
+To add yourself, or someone else, to this list you can either [use the bot](https://allcontributors.org/docs/en/bot/usage) (`@all-contributors please add <username> for <contributions>`) or [the CLI](https://allcontributors.org/docs/en/cli/usage) (`jlpm all-contributors add <username> <contributions>`).
 
 ## Attributions