Delete row ('2519', '20661') from daily_volatility

ticker_id 2519
day 20661
implied_open 0.4778226867782651
implied_high 0.4857599407114588
implied_low 0.4476611218321287
implied_close 0.4555983757653225
historical_open 0.5286211119507053
historical_high 0.5286211119507053
historical_low 0.5286211119507053
historical_close 0.5286211119507053
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