Delete row ('2539', '20486') from daily_volatility

ticker_id 2539
day 20486
implied_open 0.3000281986747246
implied_high 0.3254274112609447
implied_low 0.3000281986747246
implied_close 0.3238399604743059
historical_open 0.2968532971014471
historical_high 0.2968532971014471
historical_low 0.2968532971014471
historical_close 0.2968532971014471
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