代码规范过滤，移除冗余代码，替换掉不推荐的包

server/utility/format/format.go

@@ -8,15 +8,9 @@ package format
 import (
 	"fmt"
 	"github.com/gogf/gf/v2/util/gconv"
-	"math"
 	"strconv"
 )
 
-// RoundInt64 四舍五入
-func RoundInt64(x float64) int64 {
-	return int64(math.Floor(x + 0/5))
-}
-
 // Round2String 四舍五入保留小数，默认2位
 func Round2String(value float64, args ...interface{}) (v string) {
 	var places = 2