Delete row ('1227', '20731') from daily_volatility

ticker_id 1227
day 20731
implied_open 0.9492955704099751
implied_high 1.00644379872897
implied_low 0.9397708656901427
implied_close 0.9397708656901427
historical_open 0.8365865645586236
historical_high 0.8365865645586236
historical_low 0.8365865645586236
historical_close 0.8365865645586236
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