docs: remove screenshots from repo — should not be committed to codebase

docs/versioned_docs/version-6.0.0/api.mdx

@@ -1,35 +0,0 @@
----
-title: API
-hide_title: true
-sidebar_position: 10
----
-
-import SwaggerUI from 'swagger-ui-react';
-import openapi from '/resources/openapi.json';
-import 'swagger-ui-react/swagger-ui.css';
-import { Alert } from 'antd';
-
-## API
-
-Superset's public **REST API** follows the
-[OpenAPI specification](https://swagger.io/specification/), and is
-documented here. The docs below are generated using
-[Swagger React UI](https://www.npmjs.com/package/swagger-ui-react).
-
-<Alert
-  type="info"
-  message={
-    <div>
-      <strong>NOTE! </strong>
-      You can find an interactive version of this documentation on your local Superset
-      instance at <strong>/swagger/v1</strong> (unless disabled)
-    </div>
-  }
-/>
-
-<br />
-<br />
-<hr />
-<div className="swagger-container">
-  <SwaggerUI spec={openapi} />
-</div>