Delete row ('331', '20270') from daily_volatility

ticker_id 331
day 20270
implied_open 0.7222901079206332
implied_high 0.7476893205068534
implied_low 0.7032406984809682
implied_close 0.7127654032008007
historical_open 0.6540297240951668
historical_high 0.6540297240951668
historical_low 0.6540297240951668
historical_close 0.6540297240951668
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