Update src/test/ui/async-await/multiple-lifetimes/elided.rs

Co-Authored-By: matthewjasper <mjjasper1@gmail.com>

Author: nikomatsakis

src/test/ui/async-await/multiple-lifetimes/elided.rs

@@ -3,7 +3,7 @@
 
 // Test that we can use async fns with multiple arbitrary lifetimes.
 
-#![feature(async_await, await_macro)]
+#![feature(async_await)]
 
 async fn multiple_elided_lifetimes(_: &u8, _: &u8) {}