No, there is no such feature in GitHub (to the best of my knowledge confirmed by a quick google search).
The best alternative, excluding the proposed duplicate question for using a workaround, is to refer to this blog page, stating that:
Previously, if you wanted to use GitHub to remove files from a pull
request, you’d need to switch to the pull request branch and look for
the individual file to delete it. Now, if you have write permission,
you can click on the ‘trash’ icon for a file right in the pull
request’s “Files changed” view to make a commit and remove it.
I haven't tested this method, but I feel like it is somehow related to the rejected "alternative workaround".