Delete row ('635', '20091') from daily_volatility

ticker_id 635
day 20091
implied_open 0.671491682748193
implied_high 0.6984783461210519
implied_low 0.6429175685886955
implied_close 0.6651418796016381
historical_open 1.150901820313097
historical_high 1.150901820313097
historical_low 1.150901820313097
historical_close 1.150901820313097
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