Hide LLM responses behind a config flag

...that we never use. I'm just turning it off for now, but I want the
linter to think it could be live at any moment.

config/config.go

@@ -13,6 +13,7 @@ var (
 	Bind                       string
 	ClientID                   string
 	ClientSecret               string
+	DoLLMResponse              bool
 	DomainRMO                  string
 	DomainNidus                string
 	DomainTegola               string
@@ -82,6 +83,7 @@ func Parse() (err error) {
 	if ClientSecret == "" {
 		return fmt.Errorf("You must specify a non-empty ARCGIS_CLIENT_SECRET")
 	}
+	DoLLMResponse = false
 	DomainNidus = os.Getenv("DOMAIN_NIDUS")
 	if DomainNidus == "" {
 		return fmt.Errorf("You must specify a non-empty DOMAIN_NIDUS")