Update ObjectIdentifier.swift

Author: sunbohong

stdlib/public/core/ObjectIdentifier.swift

@@ -17,7 +17,6 @@
 ///
 /// In Swift, only class instances and metatypes have unique identities. There
 /// is no notion of identity for structs, enums, functions, or tuples.
-///
 @frozen // trivial-implementation
 public struct ObjectIdentifier {
   @usableFromInline // trivial-implementation