[openstreetmap-website] Send no content for 404 API errors (#345)

[pnorman]

Fixes #344

rails emits a space for :nothing
You can merge this Pull Request by running:

  git pull https://github.com/pnorman/openstreetmap-website error_responses

Or you can view, comment on it, or merge it online at:

  https://github.com/openstreetmap/openstreetmap-website/pull/345

-- Commit Summary --

  * Send no content for 404 API errors

-- File Changes --

    M app/controllers/application_controller.rb (2)

-- Patch Links --

https://github.com/openstreetmap/openstreetmap-website/pull/345.patch
https://github.com/openstreetmap/openstreetmap-website/pull/345.diff

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