Delete row ('2604', '20257') from daily_volatility

ticker_id 2604
day 20257
implied_open 0.2111309546229543
implied_high 0.2730415353018658
implied_low 0.1984313483298443
implied_close 0.2587544782221169
historical_open 0.2222431101294256
historical_high 0.2222431101294256
historical_low 0.2222431101294256
historical_close 0.2222431101294256
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