Rely on implicit return statements

[olleolleolle]

This PR removes explicitly added return statements where they're "implied".

I did this so that all the places "work and look the same". As a guide for the reader.

[coveralls]

Coverage decreased (-0.03%) to 79.143% when pulling c70147a on olleolleolle:return-statement-reduced-away into 45a2f5d on socketry:master.

[ioquatix]

I don't like implicit return if there is more than one line of code in a method body. However, if I'm inconsistent, it's probably a mistake. The key point is it needs to be completely unambiguous that 1/ it's a return value and 2/ future modifications to the method can't possibly break the flow control of the method.

[olleolleolle]

Consistency is more important. Thanks for making a decision! Forward!