Delete row ('1876', '20668') from daily_volatility

ticker_id 1876
day 20668
implied_open 0.633392863868863
implied_high 0.6762540351081093
implied_low 0.633392863868863
implied_close 0.6603795272417218
historical_open 0.5651324800433966
historical_high 0.5651324800433966
historical_low 0.5651324800433966
historical_close 0.5651324800433966
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