Delete row ('684', '20735') from daily_volatility

ticker_id 684
day 20735
implied_open 1.085816338060908
implied_high 1.727146455862965
implied_low 1.085816338060908
implied_close 1.60650019607842
historical_open 0.795312844106016
historical_high 0.795312844106016
historical_low 0.795312844106016
historical_close 0.795312844106016
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