Delete row ('2764', '20560') from daily_volatility

ticker_id 2764
day 20560
implied_open 0.1666823325970692
implied_high 0.1762070373169017
implied_low 0.1587450786638754
implied_close 0.1603325294505142
historical_open 0.1793819388901792
historical_high 0.1793819388901792
historical_low 0.1793819388901792
historical_close 0.1793819388901792
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