Delete row ('1481', '20480') from daily_volatility

ticker_id 1481
day 20480
implied_open 1.123915156940238
implied_high 1.142964566379903
implied_low 1.104865747500573
implied_close 1.127090058513516
historical_open 0.8953222436642575
historical_high 0.8953222436642575
historical_low 0.8953222436642575
historical_close 0.8953222436642575
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