Delete row ('2759', '20517') from daily_volatility

ticker_id 2759
day 20517
implied_open 0.2031937006897606
implied_high 0.2238305609160644
implied_low 0.1984313483298443
implied_close 0.2127184054095931
historical_open 0.1936689959699281
historical_high 0.1936689959699281
historical_low 0.1936689959699281
historical_close 0.1936689959699281
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