Delete row ('1571', '20587') from daily_volatility

ticker_id 1571
day 20587
implied_open 0.2000187991164831
implied_high 0.2000187991164831
implied_low 0.1889066436100118
implied_close 0.1968438975432056
historical_open 0.1920815451832893
historical_high 0.1920815451832893
historical_low 0.1920815451832893
historical_close 0.1920815451832893
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