refactor: code cleanup

frontend/src/main.ts

@@ -1,7 +0,0 @@
-import 'crawlab-ui/dist/style.css';
-import 'vue';
-import {createApp} from 'crawlab-ui';
-
-(async function () {
-  await createApp();
-})();

frontend/src/shims-vue.d.ts

@@ -1,6 +0,0 @@
-declare module '*.scss';
-declare module '*.vue' {
-  import {DefineComponent} from 'vue';
-  const component: DefineComponent<{}, {}, any>;
-  export default component;
-}