Delete row ('635', '20700') from daily_volatility

ticker_id 635
day 20700
implied_open 0.6873661906145806
implied_high 0.7524516728667696
implied_low 0.6476799209486118
implied_close 0.6778414858947481
historical_open 0.9937441924358603
historical_high 0.9937441924358603
historical_low 0.9937441924358603
historical_close 0.9937441924358603
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