Remove all adult content from benchmark data

[campoy]

In order to avoid having adult movie titles appearing during demos using https://play.dgraph.io we should remove all the related data from the benchmark dataset.

Currently, there are 6516 adult movies on the dataset, as shown in the query below:

{
  q(func:eq(name@., "Pornographic film")) {
    name@.
    count(~genre)
  }
}

{
  "extensions": {...},
  "data": {
    "q": [
      {
        "name@.": "Pornographic film",
        "count(~genre)": 6516,
        "uid": "0x62b974"
      }
    ]
  }
}

[github-actions[bot]]

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