Delete row ('2539', '20488') from daily_volatility

ticker_id 2539
day 20488
implied_open 0.3349521159807772
implied_high 0.355588976207081
implied_low 0.3317772144074996
implied_close 0.342889369913971
historical_open 0.3127278049678346
historical_high 0.3127278049678346
historical_low 0.3127278049678346
historical_close 0.3127278049678346
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