Delete row ('2387', '19991') from daily_volatility

ticker_id 2387
day 19991
implied_open 0.3587638777803585
implied_high 0.3746383856467461
implied_low 0.3444768207006097
implied_close 0.3730509348601073
historical_open 0.2873285923816146
historical_high 0.2873285923816146
historical_low 0.2873285923816146
historical_close 0.2873285923816146
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