Delete row ('393', '20733') from daily_volatility

ticker_id 393
day 20733
implied_open 0.2920909447415308
implied_high 0.2936783955281695
implied_low 0.2428799703557294
implied_close 0.2793913384484208
historical_open 0.1904940943966505
historical_high 0.1904940943966505
historical_low 0.1904940943966505
historical_close 0.1904940943966505
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