Delete row ('651', '20731') from daily_volatility

ticker_id 651
day 20731
implied_open 0.8603983263582049
implied_high 1.162013975819568
implied_low 0.769913631519796
implied_close 0.8492861708517336
historical_open 0.5794195371231453
historical_high 0.5794195371231453
historical_low 0.5794195371231453
historical_close 0.5794195371231453
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