Remove unnecessary comma in webgl_custom_attributes_points3

examples/webgl_custom_attributes_points3.html

@@ -219,7 +219,7 @@
 				uniforms: {
 					amplitude: { value: 1.0 },
 					color:     { value: new THREE.Color( 0xffffff ) },
-					texture:   { value: texture },
+					texture:   { value: texture }
 				},
 				vertexShader:   document.getElementById( 'vertexshader' ).textContent,
 				fragmentShader: document.getElementById( 'fragmentshader' ).textContent