fix(tekton): update README and cleanup (#881)

Author: divyanshiGupta

plugins/tekton/README.md

@@ -119,31 +119,6 @@ The Tekton plugin enables you to visualize the `PipelineRun` resources available
    yarn workspace app add @janus-idp/backstage-plugin-tekton
    ```
 
-1. Enable the **TEKTON** tab on the entity view page using the `packages/app/src/components/catalog/EntityPage.tsx` file:
-
-   ```tsx title="packages/app/src/components/catalog/EntityPage.tsx"
-   /* highlight-add-next-line */
-   import {
-     isTektonCIAvailable,
-     TektonPage,
-   } from '@janus-idp/backstage-plugin-tekton';
-
-   const serviceEntityPage = (
-     <EntityPageLayout>
-       {/* ... */}
-       {/* highlight-add-start */}
-       <EntityLayout.Route
-         if={isTektonCIAvailable}
-         path="/tekton"
-         title="Tekton"
-       >
-         <TektonPage />
-       </EntityLayout.Route>
-       {/* highlight-add-end */}
-     </EntityPageLayout>
-   );
-   ```
-
 1. Enable the PipelineRun list in the **CI/CD** tab on the entity view page.
 
    ```tsx title="packages/app/src/components/catalog/EntityPage.tsx"

plugins/tekton/src/index.ts

@@ -1,4 +1,3 @@
 export { tektonPlugin, TektonCI } from './plugin';
 export { TEKTON_CI_ANNOTATION } from './consts/tekton-const';
 export { isTektonCIAvailable } from './components/Router';
-export { PipelineRunVisualization } from './components/pipeline-topology/PipelineRunVisualization';

plugins/tekton/src/plugin.ts

@@ -8,13 +8,8 @@ import {
   createPlugin,
 } from '@backstage/core-plugin-api';
 
-import { rootRouteRef } from './routes';
-
 export const tektonPlugin = createPlugin({
   id: 'tekton',
-  routes: {
-    root: rootRouteRef,
-  },
 });
 
 export const TektonCI = tektonPlugin.provide(