Delete row ('600', '20683') from daily_volatility

ticker_id 600
day 20683
implied_open 0.8032500980392098
implied_high 0.8159497043323198
implied_low 0.7715010823064347
implied_close 0.7730885330930735
historical_open 1.171538680539401
historical_high 1.171538680539401
historical_low 1.171538680539401
historical_close 1.171538680539401
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