fixed eslint inconsistent return

app/assets/javascripts/ide/components/repo_tabs.vue

@@ -35,8 +35,7 @@ export default {
   updated() {
     if (!this.$refs.tabsScroller) return;
 
-    this.showShadow =
-      this.$refs.tabsScroller.scrollWidth > this.$refs.tabsScroller.offsetWidth;
+    this.showShadow = this.$refs.tabsScroller.scrollWidth > this.$refs.tabsScroller.offsetWidth;
   },
   methods: {
     ...mapActions(['updateViewer', 'removePendingTab']),
@@ -48,6 +47,8 @@ export default {
           router.push(`/project${this.activeFile.url}`);
         });
       }
+
+      return null;
     },
   },
 };