refactor: remove consumeQuota related logic (#738)

* feat: 删除relay-text中的consumeQuota变量

该变量始终为true，可以删除

* chore: remove useless code

---------

Co-authored-by: JustSong <songquanpeng@foxmail.com>

middleware/auth.go

@@ -106,12 +106,6 @@ func TokenAuth() func(c *gin.Context) {
 		c.Set("id", token.UserId)
 		c.Set("token_id", token.Id)
 		c.Set("token_name", token.Name)
-		requestURL := c.Request.URL.String()
-		consumeQuota := true
-		if strings.HasPrefix(requestURL, "/v1/models") {
-			consumeQuota = false
-		}
-		c.Set("consume_quota", consumeQuota)
 		if len(parts) > 1 {
 			if model.IsAdmin(token.UserId) {
 				c.Set("channelId", parts[1])