Delete row ('1115', '20731') from daily_volatility

ticker_id 1115
day 20731
implied_open 0.8429363677051787
implied_high 0.9048469483840901
implied_low 0.7778508854529897
implied_close 0.8286493106254299
historical_open 0.9302461609703101
historical_high 0.9302461609703101
historical_low 0.9302461609703101
historical_close 0.9302461609703101
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