Delete row ('2141', '20719') from daily_volatility

ticker_id 2141
day 20719
implied_open 0.7921379425327385
implied_high 0.8318242121987074
implied_low 0.7746759838797123
implied_close 0.8111873519724035
historical_open 0.8048375488258486
historical_high 0.8048375488258486
historical_low 0.8048375488258486
historical_close 0.8048375488258486
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