Removed some unused sprites

core/src/mindustry/ai/types/FlyingAI.java

@@ -7,6 +7,7 @@ import mindustry.world.meta.*;
 
 import static mindustry.Vars.*;
 
+//TODO very strange idle behavior sometimes
 public class FlyingAI extends AIController{
 
     @Override

core/src/mindustry/ai/types/FlyingFollowAI.java

@@ -6,6 +6,7 @@ import mindustry.entities.*;
 import mindustry.entities.units.*;
 import mindustry.gen.*;
 
+//TODO generally strange behavior
 /** AI/wave team only! This is used for wave support flyers. */
 public class FlyingFollowAI extends FlyingAI{
     public Teamc following;