Remove references to "empowering" CTOs.

This is one of the words to avoid on GOV.UK, as the style guide says:
<https://www.gov.uk/designprinciples/styleguide#plain-english--mandatory-for-all-of-govuk>
Merge pull request #197 from alphagov/disincentivise-empowerment-synergy-going-forward

Remove references to "empowering" CTOs.