Delete row ('2604', '20509') from daily_volatility

ticker_id 2604
day 20509
implied_open 0.2555795766488395
implied_high 0.2555795766488395
implied_low 0.2444674211423682
implied_close 0.2476423227156457
historical_open 0.2555795766488395
historical_high 0.2555795766488395
historical_low 0.2555795766488395
historical_close 0.2555795766488395
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