Delete row ('2547', '20734') from daily_volatility

ticker_id 2547
day 20734
implied_open 0.5730697339765903
implied_high 0.6254556099356692
implied_low 0.5508454229636478
implied_close 0.5921191434162554
historical_open 0.4079748521661599
historical_high 0.4079748521661599
historical_low 0.4079748521661599
historical_close 0.4079748521661599
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