Removes awaits fix as the fix is in. (#37676)

The PR for the fix has been merged.
https://github.com/elastic/elasticsearch/pull/37661
but the awaits fix annotation was not removed.

x-pack/plugin/security/src/test/java/org/elasticsearch/xpack/security/authz/store/CompositeRolesStoreTests.java

@@ -212,7 +212,6 @@ public class CompositeRolesStoreTests extends ESTestCase {
         assertNotEquals(Role.EMPTY, roleFuture.actionGet());
     }
 
-    @AwaitsFix(bugUrl="https://github.com/elastic/elasticsearch/issues/37657")
     public void testNegativeLookupsAreCached() {
         final FileRolesStore fileRolesStore = mock(FileRolesStore.class);
         doCallRealMethod().when(fileRolesStore).accept(any(Set.class), any(ActionListener.class));