Delete row ('2759', '20718') from daily_volatility

ticker_id 2759
day 20718
implied_open 0.1508078247306817
implied_high 0.1698572341703467
implied_low 0.1460454723707654
implied_close 0.1539827263039592
historical_open 0.1333458660776554
historical_high 0.1333458660776554
historical_low 0.1333458660776554
historical_close 0.1333458660776554
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