fix: push_notification delete event.
fix: push_notification delete event.

superdesk/liveblog,hlmnrmr/liveblog,superdesk/liveblog,liveblog/liveblog,liveblog/liveblog,hlmnrmr/liveblog,liveblog/liveblog,superdesk/liveblog,liveblog/liveblog,liveblog/liveblog,superdesk/liveblog,hlmnrmr/liveblog,hlmnrmr/liveblog