Delete row ('331', '20188') from daily_volatility

ticker_id 331
day 20188
implied_open 0.9143716531039225
implied_high 1.120740255366961
implied_low 0.9143716531039225
implied_close 1.039780265248384
historical_open 1.106453198287212
historical_high 1.106453198287212
historical_low 1.106453198287212
historical_close 1.106453198287212
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