Delete row ('1631', '20731') from daily_volatility

ticker_id 1631
day 20731
implied_open 0.7445144189335758
implied_high 0.8349991137719849
implied_low 0.730227361853827
implied_close 0.7715010823064347
historical_open 0.5317960135239828
historical_high 0.5317960135239828
historical_low 0.5317960135239828
historical_close 0.5317960135239828
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