vtkSMSettings: Fix build with jsoncpp-1.8.4
This is needed due to an API change in jsoncpp-1.8.4. The overloaded removeMember()
method used now is available since jsoncpp-0.8.0 and returns the removed value in a pre-allocated buffer instead of returning a new created Json::Value
object.
However, the used syntax changed, but the underlying semantics are kept the same.
Fixes #17909 (closed)
Edited by Björn Esser