docs: update removeOverview.mdx (#58)

src/content/docs/shared/removeoverview.mdx

@@ -4,16 +4,18 @@ title: RemoveOverview
 
 import { FileTree } from '@astrojs/starlight/components';
 
-:::note[April 30, 2024]
-This component is only implemented in Melissa's local Web Monetization branch. If you need it added to another doc set, let HJ know. 
-:::
-
 This component allows you to hide the *Overview* heading from a page's table of contents.
 
 ## Usage
 
 Open the `PageSidebar.astro` file.
 
+:::note
+This component is added on a per-site basis. It's not technically a shared component that's part of `@interledger/docs-design-system`.
+
+If you can't find `PageSidebar.astro`, it may not have been added to the site yet. Just let Sarah know.
+:::
+
 <FileTree>
 - src
     - components