Remove variable duplicate in webgl_light_pointlight2

examples/webgl_lights_pointlights2.html

@@ -50,7 +50,7 @@
 			if ( ! Detector.webgl ) Detector.addGetWebGLMessage();
 
 			var camera, scene, renderer, controls,
-			particle1, particle2, particle4, particle4, particle5, particle6,
+			particle1, particle2, particle4, particle5, particle6,
 			light1, light2, light3, light4, light5, light6;
 
 			var FAR = 300;