Fix panel rendering timeout

- minor code cleanups

src/module.js

@@ -1,5 +1,4 @@
 import {loadPluginCss} from 'app/plugins/sdk';
-import './color_legend';
 import { StatusHeatmapCtrl } from './status_heatmap_ctrl';
 
 loadPluginCss({
@@ -7,7 +6,6 @@ loadPluginCss({
   light: 'plugins/flant-statusmap-panel/css/statusmap.light.css'
 });
 
-
 export {
   StatusHeatmapCtrl as PanelCtrl
 };