Delete row ('331', '20140') from daily_volatility

ticker_id 331
day 20140
implied_open 0.9477081196233365
implied_high 0.9810445861427503
implied_low 0.9381834149035039
implied_close 0.969932430636279
historical_open 1.01914340502208
historical_high 1.01914340502208
historical_low 1.01914340502208
historical_close 1.01914340502208
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