Cleanup: Remove now duplicate ContainerViewHelper
EXT:beuser has a copy of ContainerViewHelper that has the ability to load RequireJS modules. This has been ported to the main class in EXT:fluid, the extended ContainerViewHelper is superfluous now.
[CLEANUP] Remove superfluous ContainerViewHelper
The ContainerViewHelper in EXT:beuser is removed due to identical
functionality introduced in Ie8464963eb421eca65c0a3c750920037bcee78bc.
Reviewed-by: Mathias Schreiber <email@example.com>
Tested-by: Mathias Schreiber <firstname.lastname@example.org>
Reviewed-by: Wouter Wolters <email@example.com>
Tested-by: Wouter Wolters <firstname.lastname@example.org>