Changes RSF error message to be more accurate

The RSF cannot, in fact, create service items on floors. As amusing as
dosh on every floor tile would be, I think it's best to just change the
message and not functionality.

code/game/objects/items/weapons/RSF.dm

@@ -64,7 +64,7 @@ RSF
 	else if (istype(A, /obj/structure/table))
 		spawn_location = A
 	else
-		to_chat(user, "The RSF can only create service items on tables, or floors.")
+		to_chat(user, "The RSF can only create service items on tables.")
 		return
 
 	if(isrobot(user))