Delete row ('631', '20727') from daily_volatility

ticker_id 631
day 20727
implied_open 1.419181003255046
implied_high 5.151277802642758
implied_low 1.203287696272176
implied_close 1.203287696272176
historical_open 0.4809975883515426
historical_high 0.4809975883515426
historical_low 0.4809975883515426
historical_close 0.4809975883515426
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