Remove broken link (#2526)

* Remove broken link

* removed empty swift category

free-programming-books-tr.md

@@ -22,7 +22,6 @@
 * [R](#r)
 * [Ruby](#ruby)
 * [Rust](#rust)
-* [Swift](#swift)
 
 
 ### Android
@@ -144,7 +143,3 @@
 
 * [Rust'a Giriş](http://bit.ly/rustagiris)
 
-
-### Swift
-
-* [Swift Türkiye](http://www.swiftturkiye.org)