Replace underscore with lodash

ee/app/assets/javascripts/operations/components/dashboard/dashboard.vue

 <script>
-import _ from 'underscore';
 import { mapState, mapActions } from 'vuex';
 import { GlModal, GlModalDirective, GlButton, GlDashboardSkeleton } from '@gitlab/ui';
 import VueDraggable from 'vuedraggable';
@@ -58,7 +57,7 @@ export default {
       return this.searchCount > 0;
     },
     okDisabled() {
-      return _.isEmpty(this.selectedProjects);
+      return Object.keys(this.selectedProjects).length === 0;
     },
   },
   created() {

ee/app/assets/javascripts/operations/components/dashboard/project.vue

 <script>
+import { isEmpty } from 'lodash';
 import { mapActions } from 'vuex';
-import _ from 'underscore';
 import Alerts from 'ee/vue_shared/dashboards/components/alerts.vue';
 import TimeAgo from 'ee/vue_shared/dashboards/components/time_ago.vue';
 import ProjectPipeline from 'ee/vue_shared/dashboards/components/project_pipeline.vue';
@@ -76,15 +76,13 @@ export default {
       return __('The branch for this project has no active pipeline configuration.');
     },
     user() {
-      return this.lastPipeline && !_.isEmpty(this.lastPipeline.user)
-        ? this.lastPipeline.user
-        : null;
+      return this.lastPipeline && !isEmpty(this.lastPipeline.user) ? this.lastPipeline.user : null;
     },
     lastPipeline() {
-      return !_.isEmpty(this.project.last_pipeline) ? this.project.last_pipeline : null;
+      return !isEmpty(this.project.last_pipeline) ? this.project.last_pipeline : null;
     },
     commitRef() {
-      return this.lastPipeline && !_.isEmpty(this.lastPipeline.ref)
+      return this.lastPipeline && !isEmpty(this.lastPipeline.ref)
         ? {
             ...this.lastPipeline.ref,
             ref_url: this.lastPipeline.ref.path,