Remove dead links

In French section, 2 dead links were living.

README.md

@@ -29,8 +29,7 @@ It's [easy](https://github.com/vhf/free-programming-books/wiki/Contribution). Pl
 + Bulgarian: [github](/free-programming-books-bg.md)
 + Chinese: [github](/free-programming-books-zh.md)
 + Czech: [github](/free-programming-books-cs.md)
-+ French: [github](/free-programming-books-fr.md) or [site](http://resrc.io/list/33/livres-gratuits-sur-la-programmation/).
++ French: [github](/free-programming-books-fr.md)
-    The French list was based on [this](http://progdupeu.pl/forums/sujet/43/une-banque-de-liens) page.
 + German: [github](/free-programming-books-de.md)
 + Greek: [github](/free-programming-books-gr.md)
 + Hungarian: [github](/free-programming-books-hu.md)