Delete row ('9', '20571') from daily_volatility

ticker_id 9
day 20571
implied_open 0.277803887661782
implied_high 0.2793913384484208
implied_low 0.2682791829419495
implied_close 0.2698666337285883
historical_open 0.252404675075562
historical_high 0.252404675075562
historical_low 0.252404675075562
historical_close 0.252404675075562
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