Delete row ('189', '20717') from daily_volatility

ticker_id 189
day 20717
implied_open 0.8810351865845087
implied_high 0.9191340054638388
implied_low 0.8492861708517336
implied_close 0.873097932651315
historical_open 0.7572140252266859
historical_high 0.7572140252266859
historical_low 0.7572140252266859
historical_close 0.7572140252266859
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