Delete row ('600', '20671') from daily_volatility

ticker_id 600
day 20671
implied_open 1.063592027047966
implied_high 1.074704182554437
implied_low 1.030255560528552
implied_close 1.0445426176083
historical_open 1.168363778966123
historical_high 1.168363778966123
historical_low 1.168363778966123
historical_close 1.168363778966123
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