Remove last OSC reference

Signed-off-by: Caspar de Haes <caspar.dehaes@five.ai>
Signed-off-by: Adrian Vernickel <adrian.vernickel@hexagon.com>

Author: caspar-ai

osi_object.proto

@@ -787,8 +787,6 @@ message MovingObject
 
             // Vehicle is a delivery van.
             //
-            // This corresponds to "van" in OpenScenario 1.x.
-            //
             TYPE_DELIVERY_VAN = 6;
 
             // Vehicle is a (heavy) truck.