Simplify `<excerpt>` component exports

Just export the `<excerpt>` component definition instead of both the
definition (which includes the controller) and the controller itself.

src/sidebar/app.js

@@ -140,7 +140,7 @@ module.exports = angular.module('h', [
   .component('annotationShareDialog', require('./components/annotation-share-dialog'))
   .component('annotationThread', require('./components/annotation-thread'))
   .component('dropdownMenuBtn', require('./components/dropdown-menu-btn'))
-  .component('excerpt', require('./components/excerpt').component)
+  .component('excerpt', require('./components/excerpt'))
   .component('groupList', require('./components/group-list'))
   .component('helpLink', require('./components/help-link'))
   .component('helpPanel', require('./components/help-panel'))

src/sidebar/components/excerpt.js

@@ -131,7 +131,7 @@ function ExcerptController($element, $scope, ExcerptOverflowMonitor) {
  *              specified number of lines and provides controls for expanding
  *              and collapsing the resulting truncated element.
  */
-var component = {
+module.exports = {
   controller: ExcerptController,
   controllerAs: 'vm',
   bindings: {
@@ -177,8 +177,3 @@ var component = {
   transclude: true,
   template: require('../templates/excerpt.html'),
 };
-
-module.exports = {
-  component: component,
-  Controller: ExcerptController,
-};

src/sidebar/components/test/excerpt-test.js

@@ -25,7 +25,7 @@ describe('excerpt', function () {
 
   before(function () {
     angular.module('app', [])
-      .component('excerpt', excerpt.component);
+      .component('excerpt', excerpt);
   });
 
   beforeEach(function () {