Micael Oliveira requested to merge remove_libxc3_support into develop Jan 08, 2021

Description

Remove support for Libxc 3. This was marked as deprecated in Octopus 10.

News snippet

Remove support for Libxc 3.

Checklist

I have checked that my code follows the Octopus coding standards
I have added tests for all the new features added in this request.