Delete row ('1670', '20168') from daily_volatility

ticker_id 1670
day 20168
implied_open 0.7984877456792935
implied_high 0.8111873519724035
implied_low 0.7667387299465185
implied_close 0.7746759838797123
historical_open 1.042955166821662
historical_high 1.042955166821662
historical_low 1.042955166821662
historical_close 1.042955166821662
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