[Changelog] Actually, DictionaryLiteral is not yet Hashable

Its conformance has been removed before swiftlang#15382 was merged.

Author: lorentey

CHANGELOG.md

@@ -225,11 +225,10 @@ Swift 4.2
 * [SE-0143][]
 
   The standard library types `Optional`, `Array`, `ArraySlice`,
-  `ContiguousArray`, `Dictionary`, `DictionaryLiteral`, `Range`, and
-  `ClosedRange` now conform to the `Hashable` protocol when their element or
-  bound types (as the case may be) conform to `Hashable`.  This makes
-  synthesized `Hashable` implementations available for types that include stored
-  properties of these types.
+  `ContiguousArray`, `Dictionary`, `Range`, and `ClosedRange` now conform to the
+  `Hashable` protocol when their element or bound types (as the case may be)
+  conform to `Hashable`.  This makes synthesized `Hashable` implementations
+  available for types that include stored properties of these types.
 
 * [SE-0196][]