Delete row ('1550', '20734') from daily_volatility

ticker_id 1550
day 20734
implied_open 0.9270712593970326
implied_high 1.290597489537307
implied_low 0.9191340054638388
implied_close 1.098515944354018
historical_open 0.5921191434162554
historical_high 0.5921191434162554
historical_low 0.5921191434162554
historical_close 0.5921191434162554
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