Delete row ('990', '20735') from daily_volatility

ticker_id 990
day 20735
implied_open 0.4238493600325475
implied_high 0.4238493600325475
implied_low 0.2412925195690907
implied_close 0.2539921258622007
historical_open 0.2031937006897606
historical_high 0.2031937006897606
historical_low 0.2031937006897606
historical_close 0.2031937006897606
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