sig-node: remove unavailable node-perf-dash.k8s.io

Author: pacoxu

sig-node/charter.md

@@ -37,7 +37,7 @@ SIG [readme]
 #### Cross-cutting and Externally Facing Processes
 
 - CRI [validation] and [testing policy]
-- Node [test grid] and [perf dashboard]
+- Node [test grid]
 
 ### Out of scope
 
@@ -69,7 +69,6 @@ SIG Technical Leads
 [validation]: /contributors/devel/sig-node/cri-validation.md
 [testing policy]: /contributors/devel/sig-node/cri-testing-policy.md
 [test grid]: https://testgrid.k8s.io/sig-node#Summary
-[perf dashboard]: http://node-perf-dash.k8s.io/#/builds
 [sig-governance]: https://github.com/kubernetes/community/blob/master/committee-steering/governance/sig-governance.md
 [readme]: https://github.com/kubernetes/community/tree/master/sig-node
-[Kubernetes Charter README]: https://github.com/kubernetes/community/blob/master/committee-steering/governance/README.md
+[Kubernetes Charter README]: https://github.com/kubernetes/community/blob/master/committee-steering/governance/README.md