Delete row ('2757', '20438') from daily_volatility

ticker_id 2757
day 20438
implied_open 0.1460454723707654
implied_high 0.1476329231574041
implied_low 0.1317584152910166
implied_close 0.1333458660776554
historical_open 0.1444580215841267
historical_high 0.1444580215841267
historical_low 0.1444580215841267
historical_close 0.1444580215841267
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