API permissions error

[eileenmcnaughton]

Our users are recording ajax permission denied requests on the Extension.get in their files. It is not causing them problems, only log noise. However, in my testing it is not actually doing anything when it returns TRUE either - if it's broke & no-one noticed then removal is good...

https://github.com/civicrm/org.civicrm.shoreditch/blob/787834ff825821d7ca01c7d6fae11074635719b7/js/highlight-table-rows.js