Delete row ('1685', '20475') from daily_volatility

ticker_id 1685
day 20475
implied_open 0.6445050193753342
implied_high 0.6445050193753342
implied_low 0.6159309052158367
implied_close 0.6365677654421404
historical_open 0.671491682748193
historical_high 0.671491682748193
historical_low 0.671491682748193
historical_close 0.671491682748193
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