Delete row ('643', '20735') from daily_volatility

ticker_id 643
day 20735
implied_open 0.976282233782834
implied_high 1.090578690420824
implied_low 0.9191340054638388
implied_close 0.976282233782834
historical_open 1.139789664806626
historical_high 1.139789664806626
historical_low 1.139789664806626
historical_close 1.139789664806626
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