Update LearnCpp.com (And Remove Duplicate) (#5086)

* Remove Duplicate LearnCpp.com

* Rename LearnCpp.com

free-courses-en.md

@@ -173,7 +173,6 @@
 * [C++ Tutorial for Beginners - Full Course](https://www.youtube.com/watch?v=vLnPwxZdW4Y) - Mike Dane - (freeCodeCamp)
 * [Google's C++ Course](https://developers.google.com/edu/c++/)
 * [Introduction to C++](http://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-096-introduction-to-c-january-iap-2011/) (MIT's opencourseware)
-* [LearnCpp.com C++ Tutorial](http://www.learncpp.com)
 * Microsoft edX Courses:
     * [Advanced C++](https://www.edx.org/course/advanced-c-plus-plus-1)
     * [Intermediate C++](https://www.edx.org/course/intermediate-c-plus-plus-1)

free-programming-books.md

@@ -1140,7 +1140,7 @@ Kerridge (PDF) (email address *requested*, not required)
 * [How To Think Like a Computer Scientist: C++ Version](http://greenteapress.com/thinkcpp/index.html) - Allen B. Downey
 * [Introduction to Design Patterns in C++ with Qt 4](http://ptgmedia.pearsoncmg.com/images/9780131879058/downloads/0131879057_Ezust_book.pdf) - Alan Ezust, Paul Ezust (PDF)
 * [Joint Strike Fighter, C++ Coding Standards, by Bjarne Stroustrup](http://www.stroustrup.com/JSF-AV-rules.pdf) (PDF)
-* [Learn C++.](http://www.learncpp.com) (Online)
+* [LearnCpp.com](https://www.learncpp.com) (HTML)
 * [Matters Computational: Ideas, Algorithms, Source Code, by Jorg Arndt](http://www.jjj.de/fxt/fxtbook.pdf) (PDF)
 * [Open Data Structures (In C++)](http://opendatastructures.org/ods-cpp.pdf) - Pat Morin (PDF)
 * [Programming Fundamentals - A Modular Structured Approach using C++](https://learning.hccs.edu/faculty/ken.busbee/programming-fundamentals-a-modular-structured-approach-using-c) - Kenneth Leroy Busbee (PDF)