Hygiene: Kill pointless external link test

We shouldn't be checking links.
We should write a separate test to cover toggling explicitly.

In process identify identical rules
/I am on the Selenium Edit Test article/
and
/I am on the "Selenium Edit Test" page/

Standardise on latter
Change-Id: I63ee7831fb7b3a9e576316228492549aa8fe1802
Merge "Hygiene: Kill pointless external link test"