clean up wrong data stored due some bugs

[vincenzopalazzo]

Bug can happens, and this means that we can store bugs without to know it before fix the bugs.

So we could start to clean up our mistake, but this can be due also some upgrade of the specs

So, this is one data to eliminate

 {
          "channel_id": "711808x1086x0",
          "node_id": "03c2abfa93eacec04721c019644584424aab2ba4dff3ac9bdab4e9c97007491dda",
          "direction": "",
          "forwards_rating": {
            "one_day": {
              "success": 0,
              "failure": 0,
              "local_failure": 0
            }
          },
          "up_time": {
            "one_day": 100,
            "full": 100
          }
        },