Delete row ('602', '20277') from daily_volatility

ticker_id 602
day 20277
implied_open 0.6492673717352505
implied_high 0.6540297240951668
implied_low 0.6127560036425592
implied_close 0.6286305115089468
historical_open 0.6191058067891142
historical_high 0.6191058067891142
historical_low 0.6191058067891142
historical_close 0.6191058067891142
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