Remove parametric testing machinery
Remove tests for parametric test machinery
Remove most uses of ParametricTestCase
Remove ParametricTestCase from nbconvert tests
Remove uses of @parametric decorator
Fix calls to validate_message
Remove workaround for parametric test weirdness
clean up imports
fix bug in mathjax

previously, if from IPython.external.mathjax import * was called, it
would cause an error, since the dest variable was renamed to
default_dest
Merge pull request #6 from ivanov/parametric-begone

remove unused imports
Merge pull request #4165 from takluyver/parametric-begone

Remove use of parametric tests

As discussed on the mailing list, our parametric tests system has been the source of various problems, and we've decided to get rid of it.