Delete row ('2604', '20487') from daily_volatility

ticker_id 2604
day 20487
implied_open 0.2000187991164831
implied_high 0.2270054624893419
implied_low 0.1984313483298443
implied_close 0.2254180117027031
historical_open 0.2238305609160644
historical_high 0.2238305609160644
historical_low 0.2238305609160644
historical_close 0.2238305609160644
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