The reason this was not "working" was that we sometimes miss notifications because ajax is still in flight.  So we had deliberately made timeouts no longer an error condition.  SE-1.1 probably doesn't have the newfangled js notification data, and even if it did, we don't want to backport all the automation to use it.

Reverting "Attempt to fix check-for-success, where no error was being thrown for a timeout"
Revert "Attempt to fix check-for-success, where no error was being thrown for a timeout"

This reverts commit d3f312b618e20cc13670ebc45c6f678e13aeed75.