Delete row ('2401', '20731') from daily_volatility

ticker_id 2401
day 20731
implied_open 0.2809787892350595
implied_high 0.3063780018212796
implied_low 0.1904940943966505
implied_close 0.1920815451832893
historical_open 0.1571576278772367
historical_high 0.1571576278772367
historical_low 0.1571576278772367
historical_close 0.1571576278772367
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