Remove duplicate type

weswigham · weswigham · commit 6f1cdf3887cd · 2017-10-30T15:26:03.000-07:00
diff --git a/lib/lib.esnext.full.d.ts b/lib/lib.esnext.full.d.ts
@@ -21,9 +21,6 @@ and limitations under the License.
 /// <reference path="lib.es2017.d.ts" />
 /// <reference path="lib.esnext.asynciterable.d.ts" />
 
-
-declare type PropertyKey = string | number | symbol;
-
 interface Array<T> {
     /**
      * Returns the value of the first element in the array where predicate is true, and undefined
