control-interface/admin-frontend: drop explicit podAnnotations

universal-chart already injects proxy.istio.io/config and
traffic.sidecar.istio.io/excludeOutboundPorts by default for every
service — explicitly setting them too produced a duplicate-key YAML
error in Flux's post-render step:

  error while running post render on files: ... yaml: unmarshal errors:
    line 42: mapping key "traffic.sidecar.istio.io/excludeOutboundPorts" already defined at line 25
    line 41: mapping key "proxy.istio.io/config" already defined at line 26

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

apps/control-interface/base/admin-frontend.yaml

@@ -88,25 +88,6 @@ spec:
           name:
             _default: regcred
 
-        podAnnotations:
-          _default:
-            traffic.sidecar.istio.io/excludeOutboundPorts: "4317,4318,9411"
-            proxy.istio.io/config: |-
-              tracing:
-                sampling: 100
-                zipkin:
-                  address: signoz-otel-collector-external.signoz.svc.cluster.local:9411
-                custom_tags:
-                  k8s.pod.name:
-                    environment:
-                      name: POD_NAME
-                  k8s.namespace.name:
-                    environment:
-                      name: POD_NAMESPACE
-                  k8s.pod.ip:
-                    environment:
-                      name: INSTANCE_IP
-
         commitSha: ""
         gitlabUri: ""
         gitlabJobUrl: ""