Delete row ('1685', '20697') from daily_volatility

ticker_id 1685
day 20697
implied_open 0.5952940449895329
implied_high 0.6127560036425592
implied_low 0.5619575784701191
implied_close 0.6048187497093654
historical_open 0.8159497043323198
historical_high 0.8159497043323198
historical_low 0.8159497043323198
historical_close 0.8159497043323198
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