removed unused uniform

examples/webgl_custom_attributes_points2.html

@@ -149,7 +149,6 @@
 			var material = new THREE.ShaderMaterial( {
 
 				uniforms: {
-					amplitude: { value: 1.0 },
 					color: { value: new THREE.Color( 0xffffff ) },
 					texture: { value: texture }
 				},