Delete row ('331', '20700') from daily_volatility

ticker_id 331
day 20700
implied_open 0.8492861708517336
implied_high 0.8810351865845087
implied_low 0.8222995074788748
implied_close 0.8810351865845087
historical_open 1.208050048632092
historical_high 1.208050048632092
historical_low 1.208050048632092
historical_close 1.208050048632092
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