Delete row ('140', '20726') from daily_volatility

ticker_id 140
day 20726
implied_open 0.89214734209098
implied_high 0.9191340054638388
implied_low 0.8048375488258486
implied_close 0.8746853834379538
historical_open 0.7064156000542456
historical_high 0.7064156000542456
historical_low 0.7064156000542456
historical_close 0.7064156000542456
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