Tidy up ExpandrecurringBillingEventsAction

Per nickfelt's suggestion on []
-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=127193451

javatests/google/registry/flows/session/LogoutFlowTest.java

@@ -52,8 +52,4 @@ public class LogoutFlowTest extends FlowTestCase<LogoutFlow> {
     sessionMetadata.setClientId(null);  // Turn off the implicit login
     runFlow();
   }
-
-  // Extra methods so the test runner doesn't produce empty shards.
-  @Test public void testNothing1() {}
-  @Test public void testNothing2() {}
 }