Refactor 2 separate task callbacks to use 1 callback with params #3307

Previously, the "About" and "Academics" sections were each using their
own callback function. But the only difference between these 2
functions was the name of the page. So, we "Don't Repeat Yourself" and
use a generic callback which takes a title param.
Remove 2 task callback functions, no longer needed #3307
Merge pull request #3544 from openscholar/3307-generic_section_task

Refactor 2 separate task callbacks to use 1 callback with params #3307