Delete row ('2604', '20647') from daily_volatility

ticker_id 2604
day 20647
implied_open 0.2539921258622007
implied_high 0.271454084515227
implied_low 0.2539921258622007
implied_close 0.2698666337285883
historical_open 0.2555795766488395
historical_high 0.2555795766488395
historical_low 0.2555795766488395
historical_close 0.2555795766488395
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