refactor: 路由代码优化和完善注释

Former-commit-id: 859d3b74927b032ad265170d6e6ffd821b3fa0d3

src/router/index.ts

@@ -43,11 +43,6 @@ export const constantRoutes: RouteRecordRaw[] = [
         path: '/404',
         component: () => import('@/views/error-page/404.vue'),
         meta: { hidden: true }
-      },
-      {
-        path: '/apidoc',
-        component: () => import('@/views/demo/apidoc.vue'),
-        meta: { hidden: true }
       }
     ]
   }