Delete row ('2227', '20731') from daily_volatility

ticker_id 2227
day 20731
implied_open 0.5079842517244014
implied_high 0.8715104818646762
implied_low 0.2905034939548921
implied_close 0.7651512791598797
historical_open 0.1666823325970692
historical_high 0.1666823325970692
historical_low 0.1666823325970692
historical_close 0.1666823325970692
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