Make the test more robust.

When running `sus --verbose`, the expectation can be a context switch.

Author: ioquatix

test/async/notification.rb

@@ -31,7 +31,6 @@
 
 		expect(task.status).to be == :running
 
-		sequence << :yielding
 		reactor.yield
 		task.wait
 		sequence << :finished
@@ -42,7 +41,6 @@
 			:waiting,
 			:running,
 			:signalled,
-			:yielding,
 			:resumed,
 			:finished
 		]