Remove AWS reboot notes for "Carrenza only" VMs
Remove AWS reboot notes for "Carrenza only" VMs

This removes AWS notes for sections of the reboot manual, as they seem
to contradict the "Carrenza only" statements in the titles.

alphagov/govuk-developer-docs,alphagov/govuk-developer-docs,alphagov/govuk-developer-docs,alphagov/govuk-developer-docs