More vent variants

tests/src/test/java/power/PowerTestFixture.java

@@ -95,13 +95,7 @@ public class PowerTestFixture{
             // Simulate the "changed" method. Calling it through reflections would require half the game to be initialized.
             tile.build = block.newBuilding().init(tile, Team.sharded, false, 0);
             if(block.hasPower){
-                new PowerGraph(){
-                    //assume there's always something consuming power
-                    @Override
-                    public float getUsageFraction(){
-                        return 1f;
-                    }
-                }.add(tile.build);
+                new PowerGraph().add(tile.build);
             }
 
             // Assign incredibly high health so the block does not get destroyed on e.g. burning Blast Compound