Update index.md

Author: streamcode9

index.md

@@ -21,7 +21,6 @@ By/Kommune/Land
 
 Profession
 * [Organizing Knowledge](/2025/04/05/organizing-knowledge.html)
-* Computer Systems from the Ground Up
 * [Principles](https://github.com/streamcode9/software-design/blob/master/README.md)
 
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