Delete row ('2539', '20735') from daily_volatility

ticker_id 2539
day 20735
implied_open 0.4794101375649039
implied_high 0.4857599407114588
implied_low 0.4682979820584325
implied_close 0.4682979820584325
historical_open 0.3571764269937197
historical_high 0.3571764269937197
historical_low 0.3571764269937197
historical_close 0.3571764269937197
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