Merge pull request kodecocodes#844 from raywenderlich/kelvinlauKL-patch-1

[Swift 4.2] Removes Swift check in Boyer-Moore-Horsepool

Author: kelvinlauKL

Boyer-Moore-Horspool/BoyerMooreHorspool.playground/Contents.swift

@@ -1,10 +1,5 @@
 //: Playground - noun: a place where people can play
 
-// last checked with Xcode 9.0b4
-#if swift(>=4.0)
-    print("Hello, Swift 4!")
-#endif
-
 /*
   Boyer-Moore string search