.clean up the code

backend/spotify_totp.go

@@ -1,28 +0,0 @@
-package backend
-
-import (
-	"fmt"
-	"time"
-
-	"github.com/pquerna/otp"
-	"github.com/pquerna/otp/totp"
-)
-
-const (
-	spotifyTOTPSecret  = "GM3TMMJTGYZTQNZVGM4DINJZHA4TGOBYGMZTCMRTGEYDSMJRHE4TEOBUG4YTCMRUGQ4DQOJUGQYTAMRRGA2TCMJSHE3TCMBY"
-	spotifyTOTPVersion = 61
-)
-
-func generateSpotifyTOTP(now time.Time) (string, int, error) {
-	key, err := otp.NewKeyFromURL(fmt.Sprintf("otpauth://totp/secret?secret=%s", spotifyTOTPSecret))
-	if err != nil {
-		return "", 0, err
-	}
-
-	code, err := totp.GenerateCode(key.Secret(), now)
-	if err != nil {
-		return "", 0, err
-	}
-
-	return code, spotifyTOTPVersion, nil
-}