Delete row ('2141', '20731') from daily_volatility

ticker_id 2141
day 20731
implied_open 0.788963040959461
implied_high 0.8238869582655136
implied_low 0.7651512791598797
implied_close 0.7730885330930735
historical_open 0.730227361853827
historical_high 0.730227361853827
historical_low 0.730227361853827
historical_close 0.730227361853827
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