refactor: align framework cleanup with new bootstrap flow

Co-authored-by: factory-droid[bot] <138933559+factory-droid[bot]@users.noreply.github.com>

pkg/response/response.go

@@ -25,16 +25,6 @@ func Success(c *fiber.Ctx, data any) error {
 	})
 }
 
-// Error 返回错误响应
-func Error(c *fiber.Ctx, httpStatus int, code int, message string) error {
-	return c.Status(httpStatus).JSON(Response{
-		Code:      code,
-		Data:      nil,
-		Message:   message,
-		Timestamp: time.Now().Format(time.RFC3339),
-	})
-}
-
 // SuccessWithMessage 返回带自定义消息的成功响应
 func SuccessWithMessage(c *fiber.Ctx, data any, message string) error {
 	return c.JSON(Response{