Delete row ('1876', '20497') from daily_volatility

ticker_id 1876
day 20497
implied_open 0.7286399110671883
implied_high 0.7318148126404658
implied_low 0.6921285429744969
implied_close 0.704828149267607
historical_open 0.5175089564442339
historical_high 0.5175089564442339
historical_low 0.5175089564442339
historical_close 0.5175089564442339
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