Delete row ('2604', '20150') from daily_volatility

ticker_id 2604
day 20150
implied_open 0.1841442912500955
implied_high 0.2127184054095931
implied_low 0.1825568404634567
implied_close 0.2127184054095931
historical_open 0.1635074310237917
historical_high 0.1635074310237917
historical_low 0.1635074310237917
historical_close 0.1635074310237917
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