Remove obsolete secret

Author: baszoetekouw

environments/template/secrets/skeleton.yml

@@ -94,7 +94,6 @@ manage_myconext_secret: secret
 manage_pdp_secret: secret
 pdp_push_endpoint_secret: secret
 manage_sp_dashboard_secret: secret
-manage_access_secret: secret
 manage_sysadmin_secret: secret
 manage_invite_secret: secret
 manage_sram_secret: secret