Delete row ('635', '20180') from daily_volatility

ticker_id 635
day 20180
implied_open 0.9159591038905613
implied_high 0.9604077259164464
implied_low 0.8207120566922361
implied_close 0.9048469483840901
historical_open 1.084228887274269
historical_high 1.084228887274269
historical_low 1.084228887274269
historical_close 1.084228887274269
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