Remove unnecessary comma in webgl_custom_attributes

examples/webgl_custom_attributes.html

@@ -106,7 +106,7 @@
 
 				amplitude: { value: 1.0 },
 				color:     { value: new THREE.Color( 0xff2200 ) },
-				texture:   { value: new THREE.TextureLoader().load( "textures/water.jpg" ) },
+				texture:   { value: new THREE.TextureLoader().load( "textures/water.jpg" ) }
 
 			};