Delete row ('1685', '20501') from daily_volatility

ticker_id 1685
day 20501
implied_open 0.7476893205068534
implied_high 0.7873755901728222
implied_low 0.736577165000382
implied_close 0.7461018697202146
historical_open 0.7191152063473557
historical_high 0.7191152063473557
historical_low 0.7191152063473557
historical_close 0.7191152063473557
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