Delete row ('600', '20207') from daily_volatility

ticker_id 600
day 20207
implied_open 0.8191246059055973
implied_high 0.8254744090521523
implied_low 0.7667387299465185
implied_close 0.7746759838797123
historical_open 1.038192814461745
historical_high 1.038192814461745
historical_low 1.038192814461745
historical_close 1.038192814461745
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