Delete row ('468', '20735') from daily_volatility

ticker_id 468
day 20735
implied_open 0.3508266238471647
implied_high 0.3508266238471647
implied_low 0.2238305609160644
implied_close 0.2270054624893419
historical_open 0.2031937006897606
historical_high 0.2031937006897606
historical_low 0.2031937006897606
historical_close 0.2031937006897606
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