There are a few ways to remove comments from another WordPress blog. The easiest way is to use the Comments plugin.
This plugin lets you manage comments, delete comments, and add new comments. You can also use the Comments widget or the Comments shortcut menu.
If you want to remove all the comments from a post, you can use the Remove All Comments button on the post’s edit screen. You can also use the Comments plugin to remove comments from specific posts or pages.
To remove only specific comments, you can use the Comments filter in the post’s custom fields section. This filter lets you enter a comment ID or comment text to find and delete it.
To permanently delete a comment, you can use the Delete Comment button on the post’s edit screen.
If you want to disable commenting on a post, you can use the Disallow Comments option in its settings page. This will prevent people from leaving comments on that post, but it will still show up in search results and be accessible through the post’s URL.