How to delete files in github using the web interface
Delete all files within a folder. Folders are deleted automatically if there is no file in it anymore.
This is not (yet?) available through the web interface.
As GitHub added File editing, then File creation features, this may make sense to propose such a feature. The recommended channel to do so is to send an email to [email protected].
Update
Deletion of files through the web interface is now available.
You can't delete folders with a browser, but you can with the desktop app. Clone the repo to a directory, delete the folder there, and commit the change with the app.