Removed redundant Block#isVisible code

core/src/mindustry/entities/comp/BuilderComp.java

@@ -215,7 +215,6 @@ abstract class BuilderComp implements Posc, Teamc, Rotc{
     public void draw(){
         if(!activelyBuilding()) return;
 
-        //TODO check correctness
         Draw.z(Layer.flyingUnit);
 
         BuildPlan plan = buildPlan();

core/src/mindustry/world/Block.java

@@ -522,7 +522,7 @@ public class Block extends UnlockableContent{
     }
 
     public boolean isVisible(){
-        return (buildVisibility.visible() || state.rules.revealedBlocks.contains(this)) && !isHidden();
+        return !isHidden();
     }
 
     public boolean isPlaceable(){