remove unnecessary DOM manipulation

Author: angyb00

app/javascript/controllers/csv_download_controller.js

@@ -21,9 +21,7 @@ export default class extends Controller {
         const anchor = document.createElement("a")
         anchor.href = objectUrl
         anchor.download = filename || "report.csv"
-        document.body.appendChild(anchor)
         anchor.click()
-        document.body.removeChild(anchor)
         URL.revokeObjectURL(objectUrl)
       })
   }