Delete row ('2687', '20720') from daily_volatility

ticker_id 2687
day 20720
implied_open 0.6905410921878581
implied_high 0.7619763775866022
implied_low 0.6476799209486118
implied_close 0.6794289366813868
historical_open 0.7111779524141619
historical_high 0.7111779524141619
historical_low 0.7111779524141619
historical_close 0.7111779524141619
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