Delete row ('560', '20726') from daily_volatility

ticker_id 560
day 20726
implied_open 0.7778508854529897
implied_high 0.8318242121987074
implied_low 0.7635638283732409
implied_close 0.7842006885995447
historical_open 0.8064249996124873
historical_high 0.8064249996124873
historical_low 0.8064249996124873
historical_close 0.8064249996124873
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