Delete row ('1803', '20726') from daily_volatility

ticker_id 1803
day 20726
implied_open 0.7826132378129059
implied_high 0.8445238184918173
implied_low 0.7397520665736596
implied_close 0.8032500980392098
historical_open 0.7746759838797123
historical_high 0.7746759838797123
historical_low 0.7746759838797123
historical_close 0.7746759838797123
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