Delete row ('2539', '20466') from daily_volatility

ticker_id 2539
day 20466
implied_open 0.3952752458730499
implied_high 0.4079748521661599
implied_low 0.3905128935131336
implied_close 0.3936877950864111
historical_open 0.284153690808337
historical_high 0.284153690808337
historical_low 0.284153690808337
historical_close 0.284153690808337
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