Delete row ('2757', '20497') from daily_volatility

ticker_id 2757
day 20497
implied_open 0.1857317420367343
implied_high 0.1889066436100118
implied_low 0.1762070373169017
implied_close 0.1825568404634567
historical_open 0.1539827263039592
historical_high 0.1539827263039592
historical_low 0.1539827263039592
historical_close 0.1539827263039592
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