Update README.md: remove duplicates within the same section/category
diff --git a/README.md b/README.md
index dcd4bc6..3b93f94 100644
--- a/README.md
+++ b/README.md
@@ -740,7 +740,6 @@ Practice:
 
 ### Functional programming (FP)
 
-- [Jargon from the functional programming world](https://github.com/hemanth/functional-programming-jargon)
 - [Goodbye, Object Oriented Programming](https://medium.com/@cscalfani/goodbye-object-oriented-programming-a59cda4c0e53#.39ax09e4k)
 - [Functional Programming & Haskell](https://www.youtube.com/watch?v=LnX3B9oaKzw) 🎞: some good reasons to learn FP!
 - [Functional Programming Fundamentals](https://www.matthewgerstman.com/functional-programming-fundamentals/): short introduction to FP and its advantages.
@@ -1211,7 +1210,6 @@ List of resources:
 ### Shell (command line)
 
 - 🧰 [alebcay/awesome-shell](https://github.com/alebcay/awesome-shell)
-- [Bash Hackers Wiki](http://wiki.bash-hackers.org/)
 - [dylanaraps/pure-bash-bible: a collection of pure bash alternatives to external processes.](https://github.com/dylanaraps/pure-bash-bible)
 - [The Bash Hackers Wiki](https://wiki.bash-hackers.org/) provides a gentler way to learn about bash than its manages.
 - [Awk in 20 Minutes](https://ferd.ca/awk-in-20-minutes.html)

👋😀
Besides these two, there are a few more duplicated links throughout the README **but** in different sections/categories:
- amazon.com/The-Linux-Programming-Interface-Handbook/dp/1593272200
- en.wikipedia.org/wiki/Domain-driven_design
- github.com/charlax/dotfiles/tree/master/vim
- github.com/charlax/engineering-management
- github.com/jwasham/coding-interview-university
- github.com/kdeldycke/awesome-falsehood
- highscalability.com/
- smile.amazon.com/Scalability-Rules-Principles-Scaling-Sites/dp/013443160X

Maybe they should be cleaned up as well?