Delete row ('2575', '20160') from daily_volatility

ticker_id 2575
day 20160
implied_open 0.342889369913971
implied_high 0.3635262301402747
implied_low 0.342889369913971
implied_close 0.3587638777803585
historical_open 0.4952846454312914
historical_high 0.4952846454312914
historical_low 0.4952846454312914
historical_close 0.4952846454312914
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