Delete row ('2766', '20657') from daily_volatility

ticker_id 2766
day 20657
implied_open 0.2031937006897606
implied_high 0.2285929132759806
implied_low 0.2031937006897606
implied_close 0.2238305609160644
historical_open 0.2158933069828706
historical_high 0.2158933069828706
historical_low 0.2158933069828706
historical_close 0.2158933069828706
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