Delete row ('1571', '20455') from daily_volatility

ticker_id 1571
day 20455
implied_open 0.1508078247306817
implied_high 0.1714446849569855
implied_low 0.1508078247306817
implied_close 0.1571576278772367
historical_open 0.1444580215841267
historical_high 0.1444580215841267
historical_low 0.1444580215841267
historical_close 0.1444580215841267
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