Delete row ('2604', '20494') from daily_volatility

ticker_id 2604
day 20494
implied_open 0.2206556593427869
implied_high 0.2222431101294256
implied_low 0.2127184054095931
implied_close 0.2158933069828706
historical_open 0.2444674211423682
historical_high 0.2444674211423682
historical_low 0.2444674211423682
historical_close 0.2444674211423682
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