Removed descriptors from our code

react/react-tests.ts

@@ -63,7 +63,7 @@ var PropTypesSpecification: React.Specification<any, any> = {
             return null;
         }
     },
-    render: (): React.Descriptor<any> => {
+    render: (): React.ReactHTMLElement => {
         return null;
     }
 };