Delete row ('615', '20249') from daily_volatility

ticker_id 615
day 20249
implied_open 0.2000187991164831
implied_high 0.2031937006897606
implied_low 0.1936689959699281
implied_close 0.1936689959699281
historical_open 0.2158933069828706
historical_high 0.2158933069828706
historical_low 0.2158933069828706
historical_close 0.2158933069828706
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