Remove stray requirement

Should have been removed in 034eb156eff1115201ad86cb4aebb2bee9a4b2cb.
settings: add report-only CSP configuration
security: First-pass refinement of CSP header
security: Specify full URL for asset hosts
security: Add data:// protocol for images
security: Add NetDNA CDN for fontawesome fonts
Add djangocms_betterpageurl

This serves as a temporary fix for

  https://github.com/divio/django-cms/issues/1479

For more information, see the docstring for the
foundation.djangocms_betterpageurl module.