remove unused scheme assignment in URL redirection logic

main.go

@@ -22,7 +22,6 @@ func main() {
 			newHost := strings.TrimSuffix(host, OldDomain) + NewDomain
 			scheme := "https"
 			if proto := c.Request.Header.Get("X-Forwarded-Proto"); len(proto) > 0 {
-				scheme = string(proto)
 			} else if forwarded := c.Request.Header.Get("Forwarded"); len(forwarded) > 0 {
 				// Forwarded: proto=https;host=xxx
 				for _, part := range strings.Split(string(forwarded), ";") {
@@ -40,7 +39,6 @@ func main() {
 			return
 		}
 	})
-
 	h.GET("/*any", func(ctx context.Context, c *app.RequestContext) {
 		c.JSON(200, map[string]interface{}{"message": "pong"})
 	})