Remove unmeaningful assertions
Remove unmeaningful assertions

The assertions depend on the return value of `(un)?hide_students`, which
is not documented nor meaningful (update always return the found objects).

It is also failing since the last line of the two methods are no longer
a `Student.update(...)`, but instead of fixing the implementation, the
unmeaningful assertions can simply be removed. Exceptions raised in
tests count as test failure.

ealonas/Markus,ealonas/Markus,benjaminvialle/Markus,melneubert/Markus,finnergizer/Markus,MarkUsProject/Markus,binuri/Markus,jeremygoh/Markus,melneubert/Markus,reidka/Markus,Lysette/Markus,arkon/Markus,binuri/Markus,MarkUsProject/Markus,david-yz-liu/Markus,david-yz-liu/Markus,benjaminvialle/Markus,reidka/Markus,WilsonChiang/Markus,reidka/Markus,david-yz-liu/Markus,WilsonChiang/Markus,SoftwareDev/Markus,melneubert/Markus,WilsonChiang/Markus,binuri/Markus,arkon/Markus,finnergizer/Markus,melneubert/Markus,jeremygoh/Markus,melneubert/Markus,david-yz-liu/Markus,benjaminvialle/Markus,binuri/Markus,MarkUsProject/Markus,melneubert/Markus,Lysette/Markus,SoftwareDev/Markus,ealonas/Markus,jeremygoh/Markus,binuri/Markus,benjaminvialle/Markus,jeremygoh/Markus,reidka/Markus,wkwan/Markus,ealonas/Markus,WilsonChiang/Markus,david-yz-liu/Markus,reidka/Markus,binuri/Markus,MarkUsProject/Markus,ealonas/Markus,finnergizer/Markus,finnergizer/Markus,MarkUsProject/Markus,jeremygoh/Markus,benjaminvialle/Markus,david-yz-liu/Markus,wkwan/Markus,MarkUsProject/Markus,arkon/Markus,melneubert/Markus,finnergizer/Markus,wkwan/Markus,Lysette/Markus,reidka/Markus,Lysette/Markus,benjaminvialle/Markus,binuri/Markus,SoftwareDev/Markus,SoftwareDev/Markus,WilsonChiang/Markus,wkwan/Markus,melneubert/Markus,arkon/Markus,wkwan/Markus,arkon/Markus,arkon/Markus,benjaminvialle/Markus,SoftwareDev/Markus,MarkUsProject/Markus,WilsonChiang/Markus,Lysette/Markus,ealonas/Markus,arkon/Markus,binuri/Markus,WilsonChiang/Markus,Lysette/Markus,reidka/Markus,ealonas/Markus,SoftwareDev/Markus,arkon/Markus,reidka/Markus,jeremygoh/Markus,david-yz-liu/Markus,Lysette/Markus,ealonas/Markus,finnergizer/Markus,wkwan/Markus,finnergizer/Markus,melneubert/Markus,MarkUsProject/Markus,WilsonChiang/Markus,arkon/Markus,jeremygoh/Markus,wkwan/Markus,finnergizer/Markus,david-yz-liu/Markus,jeremygoh/Markus,wkwan/Markus,WilsonChiang/Markus,jeremygoh/Markus,david-yz-liu/Markus,finnergizer/Markus,ealonas/Markus,SoftwareDev/Markus,wkwan/Markus,reidka/Markus,binuri/Markus