Delete row ('1876', '20612') from daily_volatility

ticker_id 1876
day 20612
implied_open 0.730227361853827
implied_high 0.7683261807331572
implied_low 0.730227361853827
implied_close 0.7540391236534084
historical_open 0.5841818894830616
historical_high 0.5841818894830616
historical_low 0.5841818894830616
historical_close 0.5841818894830616
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