LPS-40426 Remove unnecessary if statement for checking group.isStagingGroup. The staging group has been decided earlier in the init.jsp of the portlet properly if we are using remote or local staging
Revert "LPS-39793 Disallow undeployed portlets to be invoked by portlet container"

This reverts commit 6770dca88d89515e1d280f8ec2df31e396ec7bad.