fix authorization issue when access '/metrics/relation' (#586)

diff --git a/dubbo-admin-ui/src/components/metrics/ServiceRelation.vue b/dubbo-admin-ui/src/components/metrics/ServiceRelation.vue
index 003455a..c03c480 100644
--- a/dubbo-admin-ui/src/components/metrics/ServiceRelation.vue
+++ b/dubbo-admin-ui/src/components/metrics/ServiceRelation.vue
@@ -39,7 +39,6 @@
       Breadcrumb
     },
     data: () => ({
-      baseURL: '/api/dev',
       success: null,
       breads: [
         {