Merge branch 'help-review' into 'master'

Delete dead links about testing environments in the README.md

See merge request timvisee/send!9

README.md

@@ -66,7 +66,6 @@ Thanks [Mozilla][mozilla] for building this amazing tool!
 * [Configuration](#configuration)
 * [Localization](#localization)
 * [Contributing](#contributing)
-* [Testing](#testing)
 * [Deployment](#deployment)
 * [Clients](#clients)
 * [License](#license)
@@ -133,16 +132,6 @@ Pull requests are always welcome! Feel free to check out the list of ["good firs
 
 ---
 
-## Testing
-
-| ENVIRONMENT | URL
-|-------------|-----
-| Production  | <https://send.firefox.com/>
-| Stage       | <https://stage.send.nonprod.cloudops.mozgcp.net/>
-| Development | <https://send2.dev.lcip.org/>
-
----
-
 ## Deployment
 
 see also [docs/deployment.md](docs/deployment.md)