fix： 修改删除chart报错的问题

nezha-fronted/src/components/page/dashboard/panel.vue

@@ -471,6 +471,9 @@ export default {
             this.$message.error(response.msg)
           }
         })
+      }).catch(() => {
+        this.chart = {}
+        this.$store.dispatch('clearPanel')
       })
     },
     delChartOk () {