Delete row ('510', '20217') from daily_volatility

ticker_id 510
day 20217
implied_open 0.5016344485778464
implied_high 0.5349709150972602
implied_low 0.4984595470045688
implied_close 0.5254462103774277
historical_open 0.7778508854529897
historical_high 0.7778508854529897
historical_low 0.7778508854529897
historical_close 0.7778508854529897
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