Delete row ('404', '20689') from daily_volatility

ticker_id 404
day 20689
implied_open 0.1365207676509329
implied_high 0.1396956692242104
implied_low 0.1333458660776554
implied_close 0.1349333168642941
historical_open 0.1666823325970692
historical_high 0.1666823325970692
historical_low 0.1666823325970692
historical_close 0.1666823325970692
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