Delete row ('499', '20684') from daily_volatility

ticker_id 499
day 20684
implied_open 0.6064062004960041
implied_high 0.6365677654421404
implied_low 0.5889442418429779
implied_close 0.6079936512826429
historical_open 0.7127654032008007
historical_high 0.7127654032008007
historical_low 0.7127654032008007
historical_close 0.7127654032008007
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