Delete row ('40', '20440') from daily_volatility

ticker_id 40
day 20440
implied_open 0.3809881887933011
implied_high 0.3809881887933011
implied_low 0.2698666337285883
implied_close 0.2730415353018658
historical_open 0.2873285923816146
historical_high 0.2873285923816146
historical_low 0.2873285923816146
historical_close 0.2873285923816146
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