Delete row ('2766', '20496') from daily_volatility

ticker_id 2766
day 20496
implied_open 0.2143058561962319
implied_high 0.2587544782221169
implied_low 0.2127184054095931
implied_close 0.2492297735022844
historical_open 0.1793819388901792
historical_high 0.1793819388901792
historical_low 0.1793819388901792
historical_close 0.1793819388901792
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