docs: remove outdated intro animated gif (#652)

README.md

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 # Kitchen Sink [![renovate-app badge][renovate-badge]][renovate-app] [![semantic-release][semantic-image] ][semantic-url]
 
-![kitchensink](https://cloud.githubusercontent.com/assets/1268976/14084252/e309e370-f4e7-11e5-9562-24f516563ac9.gif)
-
 This is an example app used to showcase [Cypress.io](https://www.cypress.io/) testing. The application uses every API command in Cypress for demonstration purposes. Additionally this example app is configured to run tests in various CI platforms. The [tests](https://github.com/cypress-io/cypress-example-kitchensink/tree/master/cypress/e2e) are also heavily commented. For a full reference of our documentation, go to [docs.cypress.io](https://docs.cypress.io/).
 
 To see the kitchen sink application, visit [example.cypress.io](https://example.cypress.io/).