Delete row ('136', '20210') from daily_volatility

ticker_id 136
day 20210
implied_open 0.4635356296985163
implied_high 0.4635356296985163
implied_low 0.4381364171122962
implied_close 0.4492485726187675
historical_open 0.6445050193753342
historical_high 0.6445050193753342
historical_low 0.6445050193753342
historical_close 0.6445050193753342
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