Remove mention of GA cookies from privacy notice
Remove mention of GA cookies from privacy notice

- GA is being removed from the site, so no longer need to mention them
in the privacy notice
- Also update when the privacy notice was last updated

unboxed/e-petitions,unboxed/e-petitions,alphagov/e-petitions,unboxed/e-petitions,alphagov/e-petitions,unboxed/e-petitions,alphagov/e-petitions,alphagov/e-petitions