Delete row ('2687', '20430') from daily_volatility

ticker_id 2687
day 20430
implied_open 0.6349803146555018
implied_high 0.6540297240951668
implied_low 0.6254556099356692
implied_close 0.6365677654421404
historical_open 0.8381740153452624
historical_high 0.8381740153452624
historical_low 0.8381740153452624
historical_close 0.8381740153452624
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