fix(frontend): remove related brains for now (#2162)

# Description

Please include a summary of the changes and the related issue. Please
also include relevant motivation and context.

## Checklist before requesting a review

Please delete options that are not relevant.

- [ ] My code follows the style guidelines of this project
- [ ] I have performed a self-review of my code
- [ ] I have commented hard-to-understand areas
- [ ] I have ideally added tests that prove my fix is effective or that
my feature works
- [ ] New and existing unit tests pass locally with my changes
- [ ] Any dependent changes have been merged

## Screenshots (if appropriate):

frontend/app/chat/[chatId]/components/DataPanel/DataPanel.tsx

@@ -6,7 +6,6 @@ import { useChatContext } from "@/lib/context";
 import { MessageMetadata, Source } from "@/lib/types/MessageMetadata";
 
 import styles from "./DataPanel.module.scss";
-import RelatedBrains from "./components/RelatedBrains/RelatedBrains";
 import Sources from "./components/Sources/Sources";
 
 import { ChatMessage } from "../../types";
@@ -53,7 +52,6 @@ const DataPanel = (): JSX.Element => {
 
   return (
     <div className={styles.data_panel_wrapper}>
-      <RelatedBrains closeBrains={lastMessageMetadata?.closeBrains} />
       <Sources sources={lastMessageMetadata?.sources} />
     </div>
   );