Delete row ('40', '20495') from daily_volatility

ticker_id 40
day 20495
implied_open 0.3603513285669973
implied_high 0.3921003442997724
implied_low 0.3587638777803585
implied_close 0.368288582500191
historical_open 0.4063874013795212
historical_high 0.4063874013795212
historical_low 0.4063874013795212
historical_close 0.4063874013795212
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