Fix jshint error by removing empty array element
Fix jshint error by removing empty array element

See
https://github.com/jshint/jshint/commit/cbfc827f607c81915c4e6842c127d12a2844560e
for the actual change.

Sinar/popit,openstate/popit,openstate/popit,mysociety/popit,mysociety/popit,mysociety/popit,openstate/popit,Sinar/popit,openstate/popit,Sinar/popit,mysociety/popit,mysociety/popit,Sinar/popit