Removed broken licensing link (EbookFoundation#12035)

Author: M4ximumPizza

books/free-programming-books-subjects.md

@@ -399,7 +399,6 @@ Books that cover a specific programming language can be found in the [BY PROGRAM
 ### Licensing
 
 * [Creative Commons: a user guide](https://archive.org/download/CreativeCommonsUserGuide/CreativeCommonsUserGuide.pdf) - Simone Aliprandi (PDF)
-* [Open Source Licensing Software Freedom and Intellectual Property Law](https://rosenlaw.com/oslbook/) - Lawrence Rosen
 * [The Public Domain: Enclosing the Commons of the Mind](https://www.thepublicdomain.org/download/) - James Boyle