Delete row ('404', '20426') from daily_volatility

ticker_id 404
day 20426
implied_open 0.1349333168642941
implied_high 0.1349333168642941
implied_low 0.1254086121444616
implied_close 0.1285835137177391
historical_open 0.1460454723707654
historical_high 0.1460454723707654
historical_low 0.1460454723707654
historical_close 0.1460454723707654
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