Remove tests that aren't likely to fail

These tests are really just testing with or not ActiveSupport's
`#present?` works. It's not logic that's likely to break, so we'll be
better off with a slightly faster test suite.
Use hyphens to format parliamentary sessions

There's even a style guide. See page 3...

http://www.parliament.uk/documents/commons-information-office/p12.pdf
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