message: Remove reference to usedCount/elems in rdcpair natvis
diff: <Expand>
  <Item Name="first" ExcludeView="simple">first</Item>
  <Item Name="second" ExcludeView="simple">second</Item>
  - <ArrayItems>
  - <Size>usedCount</Size>
  - <ValuePointer>elems</ValuePointer>
  - </ArrayItems>
  </Expand>
  </Type>
  <Type Name="SDType">
  