fix(ui): eslint errors

Author: Guillaume Chau

packages/@vue/cli-ui/src/App.vue

@@ -27,7 +27,6 @@ export default {
 }
 </script>
 
-
 <style lang="stylus">
 @import "~@vue/ui/dist/vue-ui.css"
 @import "~file-icons-js/css/style.css"

packages/@vue/cli-ui/src/components/ClientAddonComponent.vue

@@ -8,7 +8,6 @@
   </div>
 </template>
 
-
 <script>
 export default {
   props: {

packages/@vue/cli-ui/src/components/PromptsList.vue

@@ -45,9 +45,9 @@ export default {
       const groupMap = {}
       const groups = []
       this.prompts.forEach(prompt => {
-        let group = groups[prompt.group]
+        let group = groupMap[prompt.group]
         if (!group) {
-          group = groups[prompt.group] = {
+          group = groupMap[prompt.group] = {
             id: prompt.group,
             prompts: []
           }

packages/@vue/cli-ui/src/components/TaskItem.vue

@@ -68,7 +68,7 @@ export default {
           id: this.task.id
         }
       })
-    },
+    }
   }
 }
 </script>

packages/@vue/cli-ui/src/components/TerminalView.vue

@@ -178,8 +178,6 @@ export default {
     },
 
     async fit () {
-      let parent = this.$el
-      let el = this.$refs.render
       let term = this.$_terminal
       term.element.style.display = 'none'
 

packages/@vue/cli-ui/src/views/ProjectConfigurations.vue

@@ -71,4 +71,3 @@ export default {
   .content-view /deep/ > .content
     overflow-y hidden
 </style>
-