remove shippable from ci examples

Author: MikeMcC399

docs/guides/continuous-integration/ci-provider-examples.mdx

@@ -226,10 +226,6 @@ and
 - [Basic .semaphore.yml](https://github.com/cypress-io/cypress-example-kitchensink/blob/master/basic/.semaphore.yml)
 - [Parallel .semaphore.yml](https://github.com/cypress-io/cypress-example-kitchensink/blob/master/.semaphore/semaphore.yml)
 
-### Shippable
-
-- [shippable.yml](https://github.com/cypress-io/cypress-example-kitchensink/blob/master/shippable.yml)
-
 ### AppVeyor
 
 - [Basic Example (appveyor.yml)](https://github.com/cypress-io/cypress-example-kitchensink/blob/master/appveyor.yml)