Async mesh reloading for planets

core/src/mindustry/maps/generators/BlankPlanetGenerator.java

@@ -1,7 +1,5 @@
 package mindustry.maps.generators;
 
-import arc.graphics.*;
-import arc.math.geom.*;
 import mindustry.game.*;
 import mindustry.type.*;
 import mindustry.world.*;
@@ -9,16 +7,6 @@ import mindustry.world.*;
 /** A planet generator that provides no weather, height, color or bases. Override generate().*/
 public class BlankPlanetGenerator extends PlanetGenerator{
 
-    @Override
-    public float getHeight(Vec3 position){
-        return 0;
-    }
-
-    @Override
-    public Color getColor(Vec3 position){
-        return Color.white;
-    }
-
     @Override
     public void addWeather(Sector sector, Rules rules){