Delete row ('2311', '20720') from daily_volatility

ticker_id 2311
day 20720
implied_open 0.7207026571339945
implied_high 0.7730885330930735
implied_low 0.7207026571339945
implied_close 0.742926968146937
historical_open 0.7826132378129059
historical_high 0.7826132378129059
historical_low 0.7826132378129059
historical_close 0.7826132378129059
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