Migrate to Swift 4.2

NORMANDY REAL · NORMANDY REAL · commit 2a2971800f98 · 2018-10-13T22:25:30.000+08:00
diff --git a/Ordered Array/OrderedArray.playground/Contents.swift b/Ordered Array/OrderedArray.playground/Contents.swift
@@ -1,9 +1,6 @@
 //: Playground - noun: a place where people can play
 
-// last checked with Xcode 9.0b4
-#if swift(>=4.0)
-print("Hello, Swift 4!")
-#endif
+
 
 public struct OrderedArray<T: Comparable> {
   fileprivate var array = [T]()
