I don't see much and wouldn't worry about it. However, I can tell you that Saphir Renomat could lighten the spots most likely. However, I once tried to remove a bad spot on a pair of vintage chestnut (light) colored AE's, and I damaged the leather and did more harm than good. So, if you go the Renomat route, seek guidance and be patient. AE conditioner/cleaner, which you should get anyway (or Saphir Renovateur) might also lighten the spots with a less harsh cleaning agent and zero potential for damaging the shoe by stripping.
Regardless, a few spots can just add to the vintage patina (vatina?) and character, though.