Remove the "Show XML Message Structure" action from "modeling" sub-menu

While working with "XsdMessageStructureVisualizationTestSpec" test, it is been determined that this is a deprecated feature from legacy, that needs to be removed.

You can see this action
1) import a XSD schema
2) select one of the root elements, right click, Modeling->"Show XML Message Structure"
3) This generates a "logical" model. However, there is no other actions user can do based on this model.