Delete row ('2631', '20557') from daily_volatility

ticker_id 2631
day 20557
implied_open 0.8762728342245925
implied_high 0.898497145237535
implied_low 0.8159497043323198
implied_close 0.8413489169185399
historical_open 1.968438975432055
historical_high 1.968438975432055
historical_low 1.968438975432055
historical_close 1.968438975432055
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