Delete row ('2687', '20718') from daily_volatility

ticker_id 2687
day 20718
implied_open 0.6651418796016381
implied_high 0.7127654032008007
implied_low 0.6476799209486118
implied_close 0.652442273308528
historical_open 0.7143528539874394
historical_high 0.7143528539874394
historical_low 0.7143528539874394
historical_close 0.7143528539874394
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