Don't enter event loop in akregatorstorageexporter

There are no events that could exit the loop, so the application
just hangs indefinitely.

Fixes: d0eae1cf ("Fix warning")
Signed-off-by: Alexander Miller <alex.miller@gmx.de>
2 jobs for !29 with export-fix in 1 minute and 54 seconds (queued for 2 minutes and 22 seconds)
merge request