Delete row ('2766', '20647') from daily_volatility

ticker_id 2766
day 20647
implied_open 0.2079560530496768
implied_high 0.2158933069828706
implied_low 0.2047811514763993
implied_close 0.2127184054095931
historical_open 0.2095435038363156
historical_high 0.2095435038363156
historical_low 0.2095435038363156
historical_close 0.2095435038363156
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