Revert "Add an edit link to the policy summary page"
Revert "Add an edit link to the policy summary page"

This reverts commit 0b9c8b33c9646f2dd13ef83c7212beba6eee3124.

We didn't need this link as there's already an edit link in the
now-restored second level nav

mysociety/publicwhip,mysociety/publicwhip,mysociety/publicwhip