Merge pull request #4380 from adamdmharvey/welcome-clean

example-app: Remove welcome plugin registration & cleanup

plugins/user-settings/src/components/FeatureFlags/EmptyFlags.tsx

@@ -21,7 +21,7 @@ import { Button, Typography } from '@material-ui/core';
 const EXAMPLE = `import { createPlugin } from '@backstage/core';
 
 export default createPlugin({
-  id: 'welcome',
+  id: 'plugin-name',
   register({ router, featureFlags }) {
     featureFlags.register('enable-example-feature');
   },

plugins/welcome/README.md

@@ -1,5 +1,8 @@
 # Title
 
+> This plugin formerly provided the "homepage" of early alpha versions of Backstage.
+> It is no longer in active use and in most cases can be removed from your instance.
+
 Welcome to the welcome plugin!
 
 ## Sub-section 1