chore: remove CHATBOT_SA key from k8s volume

Author: vrtornisiello

charts/basedosdados-api/templates/deployment.yaml

@@ -90,5 +90,3 @@ spec:
             items:
               - key: GCP_SA
                 path: gcp-sa.json
-              - key: CHATBOT_SA
-                path: chatbot-sa.json