Delete row ('40', '20459') from daily_volatility

ticker_id 40
day 20459
implied_open 0.2492297735022844
implied_high 0.2635168305820332
implied_low 0.2397050687824519
implied_close 0.2412925195690907
historical_open 0.2746289860885045
historical_high 0.2746289860885045
historical_low 0.2746289860885045
historical_close 0.2746289860885045
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