Delete row ('1553', '20685') from daily_volatility

ticker_id 1553
day 20685
implied_open 0.8127748027590423
implied_high 0.8778602850112313
implied_low 0.8127748027590423
implied_close 0.8699230310780375
historical_open 0.9016720468108126
historical_high 0.9016720468108126
historical_low 0.9016720468108126
historical_close 0.9016720468108126
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