Delete row ('193', '20091') from daily_volatility

ticker_id 193
day 20091
implied_open 0.6445050193753342
implied_high 0.6556171748818056
implied_low 0.6048187497093654
implied_close 0.6349803146555018
historical_open 0.7730885330930735
historical_high 0.7730885330930735
historical_low 0.7730885330930735
historical_close 0.7730885330930735
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