Delete row ('1472', '20731') from daily_volatility

ticker_id 1472
day 20731
implied_open 0.6619669780283606
implied_high 0.6683167811749156
implied_low 0.6365677654421404
implied_close 0.652442273308528
historical_open 0.4682979820584325
historical_high 0.4682979820584325
historical_low 0.4682979820584325
historical_close 0.4682979820584325
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