Delete row ('2604', '20187') from daily_volatility

ticker_id 2604
day 20187
implied_open 0.4714728836317101
implied_high 0.4905222930713751
implied_low 0.3333646651941384
implied_close 0.3349521159807772
historical_open 0.3825756395799398
historical_high 0.3825756395799398
historical_low 0.3825756395799398
historical_close 0.3825756395799398
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