Earlier commits removed all uses of page_params.email outside
of people.js, and it turns out we have page_params.user_id, so
we don't even need page_params.email for seeding the data.
We need this for node tests, so that you don't have to explicitly
remove every user between tests. (Also, people.remove() is about
to have different semantics.)
* In most cases, eslint --fix with the right comma-dangle settings was
able to update the code correctly.
* The exceptions were cases where the parser incorrectly treated the
arguments to functions like `assert_equal` as arguments; we fixed
these manually. Since this is test code, we can be reasonably
confident that just fixing the failures suffices to correct any bugs
introduced by making changes automatically.