Delete row ('1390', '20668') from daily_volatility

ticker_id 1390
day 20668
implied_open 0.7873755901728222
implied_high 0.8270618598387911
implied_low 0.7842006885995447
implied_close 0.7842006885995447
historical_open 0.9937441924358603
historical_high 0.9937441924358603
historical_low 0.9937441924358603
historical_close 0.9937441924358603
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