Delete row ('997', '20732') from daily_volatility

ticker_id 997
day 20732
implied_open 0.9477081196233365
implied_high 0.9477081196233365
implied_low 0.8349991137719849
implied_close 0.9365959641168651
historical_open 0.6079936512826429
historical_high 0.6079936512826429
historical_low 0.6079936512826429
historical_close 0.6079936512826429
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