Delete row ('1841', '20728') from daily_volatility

ticker_id 1841
day 20728
implied_open 0.671491682748193
implied_high 0.6794289366813868
implied_low 0.6476799209486118
implied_close 0.6476799209486118
historical_open 0.6556171748818056
historical_high 0.6556171748818056
historical_low 0.6556171748818056
historical_close 0.6556171748818056
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