QtIFW

remove unneeded RegisterDocumentationOperation

Change-Id: I2e305383b6fe9d1578059ba8887a520874e04f10
Reviewed-by: Niels Weber <niels.weber@digia.com>
Reviewed-by: Karsten Heimrich <karsten.heimrich@digia.com>
Reviewed-by: Tim Jenssen <tim.jenssen@digia.com>