neuron-web: drop unused registry-pull-secret

The registry currently allows anonymous cluster-internal pulls so the
imagePullSecrets reference was failing the externalsecret reconcile
(secret/data/mudcraft has no registry creds for this app). Pod was
pulling fine anyway. If the registry later gets locked down, add a
proper externalsecret using the path from secret/data/<app> instead of
borrowing mudcraft's.

servers/legion/k8s/neuron-technologies/web/kustomization.yaml

@@ -2,7 +2,6 @@ apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization
 resources:
   - namespace.yaml
-  - registry-pull-secret.yaml
   - externalsecret.yaml
   - service.yaml
   - deployment.yaml