Fix duplicate with wrong title

Author: vhf

free-programming-books.md

@@ -1523,7 +1523,6 @@ See also [TeX](#tex)
 
 ### Python
 * [A Beginner's Python Tutorial](http://en.wikibooks.org/wiki/A_Beginner%27s_Python_Tutorial)
-* [A Bit of Python and Other Things](https://github.com/RafeKettler/magicmethods)
 * [A Guide to Python's Magic Methods](https://github.com/RafeKettler/magicmethods) - Rafe Kettler
 * [Automate the Boring Stuff](http://automatetheboringstuff.com/chapter0/) - Al Sweigart
 * [Biopython](http://biopython.org/DIST/docs/tutorial/Tutorial.pdf)