Delete row ('1856', '20669') from daily_volatility

ticker_id 1856
day 20669
implied_open 1.123915156940238
implied_high 1.242973965938145
implied_low 1.03184301131519
implied_close 1.14772691873982
historical_open 0.9080218499573676
historical_high 0.9080218499573676
historical_low 0.9080218499573676
historical_close 0.9080218499573676
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