ExpiredDeprecationError being hit

[effigies]

A bunch of DeprecationWarnings got promoted to ExpiredDeprecationError post-release, so we should update the tests.

Would be good to expect the exception in 3.0.x and remove the deprecated code in master.

[effigies]

Finished in 3.0.1, need to follow-up in 3.1.0.

[effigies]

Removing the deprecated code will make the errors less informative in case somebody missed the 3.0.x series. Let's plan to remove them in 4.0 instead.