Delete row ('2764', '20691') from daily_volatility

ticker_id 2764
day 20691
implied_open 0.1587450786638754
implied_high 0.1587450786638754
implied_low 0.1508078247306817
implied_close 0.1539827263039592
historical_open 0.1650948818104304
historical_high 0.1650948818104304
historical_low 0.1650948818104304
historical_close 0.1650948818104304
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