Revert "MGetRoomVisitCount:也先去掉"

This reverts commit 155ad046.

domain/cache/room_c/userRoomVisit.go

@@ -78,7 +78,6 @@ func GetUserRoomVisit(userId uint64) (map[string]int64, error) {
 func MGetRoomVisitCount(groupIds []string) (map[string]string, error) {
 	key := redis_key.GetPrefixRoomVisitCount()
 	visit := make(map[string]string)
-	return visit, nil
 	if len(groupIds) <= 0 {
 		return visit, nil
 	}