Delete row ('1571', '20174') from daily_volatility

ticker_id 1571
day 20174
implied_open 0.1777944881035405
implied_high 0.1857317420367343
implied_low 0.1730321357436242
implied_close 0.174619586530263
historical_open 0.2063686022630381
historical_high 0.2063686022630381
historical_low 0.2063686022630381
historical_close 0.2063686022630381
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