Revert 'Revert "Remove the changelog generation script."'
Revert 'Revert "Remove the changelog generation script."'

This revert was in error, I was reading logs since the 5.0.0 release
and got in a hurry. During the release procedure we do want to remove
the gitlogtochangelog script.

pyrovski/papi,arm-hpc/papi,arm-hpc/papi,pyrovski/papi,arm-hpc/papi,arm-hpc/papi,pyrovski/papi,arm-hpc/papi,pyrovski/papi,pyrovski/papi,arm-hpc/papi,arm-hpc/papi,pyrovski/papi,pyrovski/papi,pyrovski/papi