Delete row ('40', '20480') from daily_volatility

ticker_id 40
day 20480
implied_open 0.2619293797953945
implied_high 0.2730415353018658
implied_low 0.2619293797953945
implied_close 0.2698666337285883
historical_open 0.3063780018212796
historical_high 0.3063780018212796
historical_low 0.3063780018212796
historical_close 0.3063780018212796
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