Delete row ('1658', '20518') from daily_volatility

ticker_id 1658
day 20518
implied_open 0.6984783461210519
implied_high 0.7603889267999634
implied_low 0.3651136809269135
implied_close 0.3968626966596887
historical_open 0.6413301178020567
historical_high 0.6413301178020567
historical_low 0.6413301178020567
historical_close 0.6413301178020567
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