Redundant check for workshop instructors in workshops table

[maneesha]

In the workshops table includes block, we check for instructors in the first line of the script, meaning the table only populates if the workshop has instructors. We check for instructors again a bit further down. Recommendation is to remove the redundant second {% if w.instructors %} check because that is already checked for.

[maneesha]

Closing this as it is not relevant to the new website.