Revert "Include "How Government Works" on browse page"

This reverts commit 8017dc2d9e36243b9f874a9a28bcb82c74e20796.

We no longer need this as we have created an artefact in Panopticon and
included it in this subsection, and it had stopped working anyway.
Merge pull request #247 from alphagov/remove-how-government-works-workaround

Revert "Include "How Government Works" on browse page"