Delete row ('1990', '20735') from daily_volatility

ticker_id 1990
day 20735
implied_open 0.6873661906145806
implied_high 0.7635638283732409
implied_low 0.6873661906145806
implied_close 0.7191152063473557
historical_open 0.8318242121987074
historical_high 0.8318242121987074
historical_low 0.8318242121987074
historical_close 0.8318242121987074
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