Delete row ('738', '20670') from daily_volatility

ticker_id 738
day 20670
implied_open 0.9921567416492215
implied_high 1.008031249515609
implied_low 0.9381834149035039
implied_close 0.9461206688366977
historical_open 0.8619857771448437
historical_high 0.8619857771448437
historical_low 0.8619857771448437
historical_close 0.8619857771448437
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