remove missing icons from articles

_article/_info/about.md

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 title: About TeX4TUM
-icon: question
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_article/_info/contact.md

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 title: Contact
-icon: user-edit
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 # Contact Form

_article/_info/contribution.md

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 title: Contribution
-icon: edit
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 This article describes how you can contribute or edit articles.

_article/_info/links.md

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 title: Links
-icon: file-alt
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 ## Other Websites

_article/_info/team.md

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 title: Team
-icon: users
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 # Our Team

_article/_info/todo.md

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 title: TODO
-icon: tasks
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 This pages displays articles that needs improvement.

_article/electronics/electronics.md

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 title: Electronics
-icon: microchip
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 This cateogory covers topics for practical use. The theory of [electromagnetism](electromagnetism) is covered by the physics category.

_article/informatics/informatics.md

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 title: Informatics
-icon: code
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 Informatics is the study of computation, automation, and information. 

_article/machines/machines.md

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 title: Machines
-icon: cogs
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  This branch will cover mechanical engineering and its applications. The theory on motion and materials are coverd in physics.

_article/math/math.md

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 title: Math
-icon: calculator
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 {{ FOLDER_TOC }}

_article/physics/physics.md

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 title: Physics
-icon: flask
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 Physics is a natural science and studies matter, motion, and energy.