Delete row ('1857', '20734') from daily_volatility

ticker_id 1857
day 20734
implied_open 0.8461112692784561
implied_high 0.8461112692784561
implied_low 0.6492673717352505
implied_close 0.6667293303882769
historical_open 0.7222901079206332
historical_high 0.7222901079206332
historical_low 0.7222901079206332
historical_close 0.7222901079206332
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