Adjust to mypy 0.710

Re-exports are only considered with "as" now, and I can't
redefine variables I have defined already.
3 jobs for master in 8 minutes and 36 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Test
passed #204402
test

00:07:03

 
  Deploy
passed #204403
pages

00:01:33

passed pages:deploy

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