Remove assert.expect from tests

[elwayman02]

Nearly all of our tests call assertions synchronously - that is, they aren't wrapped in callbacks or other scenarios where it's possible that one or more of the assertions won't get called. As a result, using assert.expect becomes unnecessary, since we'll never have a scenario where only some of the assertions get run. We should remove assert.expect from all tests of this nature to make our tests less brittle to future changes.