Delete row ('2764', '20438') from daily_volatility

ticker_id 2764
day 20438
implied_open 0.1444580215841267
implied_high 0.1587450786638754
implied_low 0.1444580215841267
implied_close 0.1523952755173204
historical_open 0.1269960629311004
historical_high 0.1269960629311004
historical_low 0.1269960629311004
historical_close 0.1269960629311004
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