Delete row ('2764', '20181') from daily_volatility

ticker_id 2764
day 20181
implied_open 0.1555701770905979
implied_high 0.1714446849569855
implied_low 0.1476329231574041
implied_close 0.1698572341703467
historical_open 0.1523952755173204
historical_high 0.1523952755173204
historical_low 0.1523952755173204
historical_close 0.1523952755173204
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