Delete row ('2661', '20406') from daily_volatility

ticker_id 2661
day 20406
implied_open 0.5413207182438152
implied_high 0.5651324800433966
implied_low 0.5254462103774277
implied_close 0.5317960135239828
historical_open 0.5365583658838989
historical_high 0.5365583658838989
historical_low 0.5365583658838989
historical_close 0.5365583658838989
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