Delete row ('2763', '20511') from daily_volatility

ticker_id 2763
day 20511
implied_open 0.1444580215841267
implied_high 0.1698572341703467
implied_low 0.1444580215841267
implied_close 0.1523952755173204
historical_open 0.1428705707974879
historical_high 0.1428705707974879
historical_low 0.1428705707974879
historical_close 0.1428705707974879
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