Delete row ('615', '20395') from daily_volatility

ticker_id 615
day 20395
implied_open 0.2079560530496768
implied_high 0.2158933069828706
implied_low 0.2079560530496768
implied_close 0.2158933069828706
historical_open 0.1777944881035405
historical_high 0.1777944881035405
historical_low 0.1777944881035405
historical_close 0.1777944881035405
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