Delete row ('2387', '20531') from daily_volatility

ticker_id 2387
day 20531
implied_open 0.704828149267607
implied_high 0.730227361853827
implied_low 0.6968908953344132
implied_close 0.7032406984809682
historical_open 0.7111779524141619
historical_high 0.7111779524141619
historical_low 0.7111779524141619
historical_close 0.7111779524141619
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