Delete row ('602', '20291') from daily_volatility

ticker_id 602
day 20291
implied_open 0.671491682748193
implied_high 0.6921285429744969
implied_low 0.6445050193753342
implied_close 0.6683167811749156
historical_open 0.6508548225218893
historical_high 0.6508548225218893
historical_low 0.6508548225218893
historical_close 0.6508548225218893
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