Delete row ('2539', '20011') from daily_volatility

ticker_id 2539
day 20011
implied_open 0.342889369913971
implied_high 0.3746383856467461
implied_low 0.3397144683406934
implied_close 0.3714634840734685
historical_open 0.2984407478880858
historical_high 0.2984407478880858
historical_low 0.2984407478880858
historical_close 0.2984407478880858
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