Delete row ('331', '20304') from daily_volatility

ticker_id 331
day 20304
implied_open 0.6984783461210519
implied_high 0.7207026571339945
implied_low 0.6984783461210519
implied_close 0.7064156000542456
historical_open 0.9572328243431689
historical_high 0.9572328243431689
historical_low 0.9572328243431689
historical_close 0.9572328243431689
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