Consider removing LibreOffice Math

Originally created by @sajolida on #16911 (Redmine)

It’s super specialized and probably only used by very few Tails users.
Users who need it probably know what it is already and can install it using Additional Software.
Bonus, I’ll get everybody rid of the top-level menu “Science” in “Applications” and help newcomers find their way. Cf #11248 (closed).
It might also save us some megabytes.

Let’s try and see :)

Feature Branch: feature/16911-remove-libreoffice-math

Edited May 15, 2020 by sajolida

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