Update identity.js

usually a new object will not return as a wrapped promise, but a raw object, so no need to put `await` overhead

Author: David Liu

examples/javascript/identity.js

@@ -13,7 +13,7 @@ const tenancyId = {
 };
 
 (async () => {
-  const identityClient = await new identity.IdentityClient({
+  const identityClient = new identity.IdentityClient({
     authenticationDetailsProvider: provider
   });
   const regions = await identityClient.listRegionSubscriptions(tenancyId);