Delete row ('2717', '20720') from daily_volatility

ticker_id 2717
day 20720
implied_open 0.2270054624893419
implied_high 0.2397050687824519
implied_low 0.2000187991164831
implied_close 0.2000187991164831
historical_open 0.2873285923816146
historical_high 0.2873285923816146
historical_low 0.2873285923816146
historical_close 0.2873285923816146
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