Delete row ('2687', '20615') from daily_volatility

ticker_id 2687
day 20615
implied_open 0.8651606787181212
implied_high 0.885797538944425
implied_low 0.8191246059055973
implied_close 0.8254744090521523
historical_open 0.8080124503991261
historical_high 0.8080124503991261
historical_low 0.8080124503991261
historical_close 0.8080124503991261
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