Delete row ('600', '20570') from daily_volatility

ticker_id 600
day 20570
implied_open 0.9858069385026665
implied_high 1.027080658955274
implied_low 0.9858069385026665
implied_close 1.015968503448803
historical_open 0.8937347928776188
historical_high 0.8937347928776188
historical_low 0.8937347928776188
historical_close 0.8937347928776188
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