Delete row ('1670', '20727') from daily_volatility

ticker_id 1670
day 20727
implied_open 0.6349803146555018
implied_high 0.6667293303882769
implied_low 0.633392863868863
implied_close 0.6587920764550831
historical_open 0.7746759838797123
historical_high 0.7746759838797123
historical_low 0.7746759838797123
historical_close 0.7746759838797123
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