Delete row ('9', '20530') from daily_volatility

ticker_id 9
day 20530
implied_open 0.2412925195690907
implied_high 0.2698666337285883
implied_low 0.2412925195690907
implied_close 0.2682791829419495
historical_open 0.2397050687824519
historical_high 0.2397050687824519
historical_low 0.2397050687824519
historical_close 0.2397050687824519
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