Delete row ('635', '20217') from daily_volatility

ticker_id 635
day 20217
implied_open 0.9191340054638388
implied_high 0.9858069385026665
implied_low 0.8778602850112313
implied_close 0.9334210625435876
historical_open 1.201700245485537
historical_high 1.201700245485537
historical_low 1.201700245485537
historical_close 1.201700245485537
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