Remove "links" view mode from os_profiles app settings.

#5393 

This PR addresses https://github.com/openscholar/openscholar/issues/5393#issuecomment-38838265

The "links" option is removed and "Title" now creates a link:
![selection_046](https://cloud.githubusercontent.com/assets/4497748/2560586/879ed65a-b7d4-11e3-961c-6d4dd8926ab1.png)

![selection_044](https://cloud.githubusercontent.com/assets/4497748/2560597/b30ca588-b7d4-11e3-9c5a-c7130e04660d.png)