Update webgpu_compute_water.html

Clean up.

examples/webgpu_compute_water.html

@@ -266,8 +266,6 @@
 				waterMesh.rotation.x = - Math.PI * 0.5;
 				waterMesh.matrixAutoUpdate = false;
 				waterMesh.updateMatrix();
-				waterMesh.receiveShadow = true;
-				waterMesh.castShadow = true;
 
 				scene.add( waterMesh );
 
@@ -277,8 +275,6 @@
  				borderGeom.rotateY( Math.PI * 0.25 );
  				poolBorder = new THREE.Mesh( borderGeom, new THREE.MeshStandardMaterial( { color: 0x908877, roughness: 0.2 } ) );
  				scene.add( poolBorder );
- 				poolBorder.receiveShadow = true;
- 				poolBorder.castShadow = true;
 
 				// THREE.Mesh just for mouse raycasting
 				const geometryRay = new THREE.PlaneGeometry( BOUNDS, BOUNDS, 1, 1 );
@@ -407,8 +403,6 @@
  				scene.environmentIntensity = 1.25;
 
 				duckModel = model.scene.children[ 0 ];
-				duckModel.receiveShadow = true;
-				duckModel.castShadow = true;
 				duckModel.material.positionNode = Fn( () => {
 
 					const instancePosition = duckInstanceDataStorage.element( instanceIndex ).get( 'position' );