Delete row ('1338', '20711') from daily_volatility

ticker_id 1338
day 20711
implied_open 0.1793819388901792
implied_high 0.1920815451832893
implied_low 0.1793819388901792
implied_close 0.187319192823373
historical_open 0.1206462597845453
historical_high 0.1206462597845453
historical_low 0.1206462597845453
historical_close 0.1206462597845453
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