Delete row ('6', '20642') from daily_volatility

ticker_id 6
day 20642
implied_open 1.379494733589078
implied_high 1.422355904828324
implied_low 1.379494733589078
implied_close 1.395369241455465
historical_open 1.347745717856303
historical_high 1.347745717856303
historical_low 1.347745717856303
historical_close 1.347745717856303
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