Revert "Set some headers as recommended by Pentesting"

This reverts commit edc658f7.

common/playbooks/k8s.yaml

@@ -358,12 +358,7 @@
           --set controller.service.type=NodePort
           --set controller.service.externalIPs={{ '{' + hostvars[groups['ingress'][0]].ansible_default_ipv4.address + '}' }}
           --set controller.config.proxy-body-size=0
-          --set controller.config.hide-headers='x-jupyterhub-version'
           --set controller.allowSnippetAnnotations=false
-          --set controller.addHeaders.X-Content-Type-Options=nosniff
-          --set controller.addHeaders.Referrer-Policy=no-referrer
-          --set controller.addHeaders.Permissions-Policy="geolocation=()"
-          --set controller.addHeaders.Content-Security-Policy="frame-ancestors 'none'; report-uri /hub/security/csp-report; default-src 'self'"
           --version={{ version }}
       shell: |-
         helm status --namespace kube-system cluster-ingress