Delete row ('2539', '20509') from daily_volatility

ticker_id 2539
day 20509
implied_open 0.3492391730605259
implied_high 0.3571764269937197
implied_low 0.3333646651941384
implied_close 0.3349521159807772
historical_open 0.3413019191273322
historical_high 0.3413019191273322
historical_low 0.3413019191273322
historical_close 0.3413019191273322
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