Fix linting.

.eslintrc

@@ -42,6 +42,7 @@
     "invisible":true,
     "asyncRender":true,
     "selectDropdown":true,
+    "selectBox":true,
     "asyncTestDiscourse":true,
     "fixture":true,
     "find":true,

app/assets/javascripts/discourse/components/select-box/select-box-header.js.es6

@@ -1,5 +1,3 @@
-import computed from 'ember-addons/ember-computed-decorators';
-
 export default Ember.Component.extend({
   classNames: "select-box-header",
 

test/javascripts/models/topic-test.js.es6

@@ -1,4 +1,4 @@
-import { IMAGE_VERSION as v} from 'pretty-text/emoji';
+import { IMAGE_VERSION as v } from 'pretty-text/emoji';
 
 QUnit.module("model:topic");