This reverts commit 5d9e1c6c

This reverts commit af654276.

This reverts commit 4a92f1ad.

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This reverts commit f3f0e831.

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This reverts commit 70915984.

We're not using this anymore since Redmine and the shortcut itself is
present nowhere on the website.

We're not using this anymore since Redmine and all these links now point
to https://tails.boum.org/working_together/Redmine which is not very
relevant.

See https://mailman.boum.org/pipermail/tails-ux/2017-March/003356.html

This reverts commit dc8312d3.

Now that we have an estimate of our storage needs until end 2018 let's
use that to be at ease with the failover too. (ref: #10244)

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