Swift Essentials, Second Edition is no longer free (#3475)

free-programming-books.md

@@ -2544,7 +2544,6 @@ Kerridge (PDF) (email address *requested*, not required)
 
 * [Hacking with Swift](https://www.hackingwithswift.com)
 * [Learn Swift](http://books.aidanf.net/learn-swift)
-* [Swift Essentials - Second Edition](https://www.packtpub.com/packt/free-ebook/swift-essentials) - Dr. Alex Blewitt, Packt (email address *requested*, not required)
 * [Swift Pocket Reference](http://www.oreilly.com/programming/free/swift-pocket-reference.csp) (email address *requested*, not required)
 * [Test-driven iOS Development with Swift](https://www.packtpub.com/packt/free-ebook/TDD-Swift) - Dr. Dominik Hauser, Packt. (email address *requested*, not required)
 * [The Swift Programming Language](https://developer.apple.com/library/prerelease/ios/documentation/Swift/Conceptual/Swift_Programming_Language/index.html) (HTML) [(iBook)](https://itunes.apple.com/us/book/swift-programming-language/id881256329?mt=11)