How to remove Featured Image from content

Currently, the RSS Post Importer takes the top image for the featured image – this works well. However, it still leaves the image in the content, thus creating a double-up of the image when posted (the feature image is directly above duplicated image in the content). It also adds 2 images in my media library.

I need to manually remove the image from the post content’s html before publishing.

Is there any way for this to be done automatically? Is there a setting I am missing or do I need to add a script? If so, what?

Here is an example of the code I need to delete from the content box: