Delete row ('1856', '20678') from daily_volatility

ticker_id 1856
day 20678
implied_open 0.9873943892893052
implied_high 1.033430462101829
implied_low 0.6111685528559204
implied_close 0.742926968146937
historical_open 0.9143716531039225
historical_high 0.9143716531039225
historical_low 0.9143716531039225
historical_close 0.9143716531039225
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