Revert "Merge pull request #4025 from guardian/new-live-blog"

This reverts commit e9da6e5316f0c09607d1eda630c97a63bf7add69, reversing
changes made to df639cc8aba38a53929972dac3864207f09c770c.
Merge pull request #4029 from guardian/live-blog-revert

Revert "Merge pull request #4025 from guardian/new-live-blog"