remove unused ansible var

bubble-server/src/main/resources/ansible/roles/bubble/files/bubble_role.json

@@ -11,7 +11,6 @@
     {"name": "promo_code_policy", "value": "[[#compare fork '==' true]][[configuration.promoCodePolicy]][[else]]disabled[[/compare]]"},
     {"name": "default_locale", "value": "[[network.locale]]"},
     {"name": "time_zone", "value": "[[network.timezone]]"},
-    {"name": "bubble_version", "value": "[[configuration.version]]"},
     {"name": "bubble_host", "value": "[[node.fqdn]]"},
     {"name": "bubble_cname", "value": "[[network.networkDomain]]"},
     {"name": "admin_user", "value": "[[node.ansibleUser]]"},