Delete row ('1438', '20731') from daily_volatility

ticker_id 1438
day 20731
implied_open 0.2381176179958132
implied_high 0.2460548719290069
implied_low 0.2238305609160644
implied_close 0.2285929132759806
historical_open 0.1920815451832893
historical_high 0.1920815451832893
historical_low 0.1920815451832893
historical_close 0.1920815451832893
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