Link Whisper is able to delete inbound internal links when their target post is deleted. This is an advanced feature, and needs to be turned on from the Link Whisper Settings.

To do this, please go to the Link Whisper Settings, and navigate to the “Advanced Settings’ tab. From the listed options, please locate and toggle “on” the one called “Remove Inbound Internal Links When Their Target Post is Deleted” and then save the settings.

Going forward, whenever you delete a post from the WordPress Admin, Link Whisper will delete all the Inbound Internal links that pointed to the now deleted post.