Delete row ('2539', '20266') from daily_volatility

ticker_id 2539
day 20266
implied_open 0.3127278049678346
implied_high 0.3190776081143896
implied_low 0.3095529033945571
implied_close 0.3111403541811958
historical_open 0.2539921258622007
historical_high 0.2539921258622007
historical_low 0.2539921258622007
historical_close 0.2539921258622007
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