Add a note that datastore is unused by this stack.
Add a note that datastore is unused by this stack.

Change-Id: I3cc512925531bc54fb70a6e7b466c39eb9aee5cc
GitOrigin-RevId: 842f1409c2a174b18ae0a0d68a5c357a2a7caab8

googlecloudrobotics/core,googlecloudrobotics/core,googlecloudrobotics/core