refactor: set http return code to static

util/ginRes.go

@@ -1,9 +1,12 @@
 package util
 
-import "github.com/gin-gonic/gin"
+import (
+	"github.com/gin-gonic/gin"
+	"net/http"
+)
 
-func ReturnJson(c *gin.Context, httpCode int, code int, msg string, data interface{}) {
-	c.JSON(httpCode, gin.H{
+func ReturnJson(c *gin.Context, code int, msg string, data interface{}) {
+	c.JSON(http.StatusOK, gin.H{
 		"code": code,
 		"msg":  msg,
 		"data": data,