`remote-redux-devtools` is now explicitly excluded and disabled in non-
dev builds, and in the `testDev` build. This was causing console errors
in the `testDev` build during e2e tests, which would cause certain
tests to fail.
This was already only supposed to be enabled for development builds,
but this library used the `NODE_ENV` environment variable to make that
determination. This gives us more control over when it's disabled.