Remove unused prop

Summary:
While reading through the Inspector I found this prop passed down and not used anywhere

printer_shredder

Reviewed By: Katalune

Differential Revision: D22431895

fbshipit-source-id: 6cbc97b3faec26349a1ad900ffa455e95f53bb2b

desktop/plugins/layout/__tests__/Inspector.node.tsx

@@ -37,7 +37,6 @@ beforeEach(() => {
       selectedElement={null}
       selectedAXElement={null}
       onSelect={() => {}}
-      onDataValueChanged={() => {}}
       setPersistedState={() => {}}
       persistedState={{
         rootElement: null,