Update metadata in <unordered_set> operators reference

Author: Rageking8

docs/standard-library/unordered-set-operators.md

@@ -1,9 +1,8 @@
 ---
-description: "Learn more about: <unordered_set> operators"
 title: "<unordered_set> operators"
-ms.date: "11/04/2016"
+description: "Learn more about: <unordered_set> operators"
+ms.date: 11/04/2016
 f1_keywords: ["unordered_set/std::operator!=", "unordered_set/std::operator=="]
-ms.assetid: 8653eea6-12f2-4dd7-aa2f-db38a71599a0
 ---
 # `<unordered_set>` operators