cmd/pkgserver: minimum viable frontend

cmd/pkgserver/api.go

@@ -122,7 +122,6 @@ func WritePayload(w http.ResponseWriter, payload any) {
 	w.Header().Set("Cache-Control", "no-cache, no-store, must-revalidate")
 	w.Header().Set("Pragma", "no-cache")
 	w.Header().Set("Expires", "0")
-	w.WriteHeader(http.StatusOK)
 	err := json.NewEncoder(w).Encode(payload)
 	if err != nil {
 		http.Error(w, err.Error(), http.StatusInternalServerError)