Delete row ('331', '19997') from daily_volatility

ticker_id 331
day 19997
implied_open 0.7000657969076907
implied_high 0.7461018697202146
implied_low 0.6889536414012194
implied_close 0.7175277555607169
historical_open 0.6381552162287792
historical_high 0.6381552162287792
historical_low 0.6381552162287792
historical_close 0.6381552162287792
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